PATENT DOCUMENT

Publication Number: US-9912978-B2
Application Number: US-201313953643-A
Country: US
Kind Code: B2

Title: Systems, methods, and computer-readable media for transitioning media playback between multiple electronic devices

Abstract:
Systems, methods, and computer-readable media for transitioning media playback between multiple electronic devices are provided. A first electronic subsystem may be configured to playback first media with a first playback value of a first playback characteristic, determine a first relationship value of a first relationship characteristic between the first electronic subsystem and the second electronic subsystem, and transmit a first control instruction that is based on the determined first relationship value and the first playback value. The second electronic subsystem may be configured to receive the transmitted first control instruction and playback second media with a second playback value of the first playback characteristic, where the second playback value may be based on the received first control instruction. This may enable a consistent experience for a user proximate to the first subsystem as the playback of media is transitioned from the first subsystem to the second subsystem.

Claims:
What is claimed is: 
     
       1. An electronic system comprising:
 a sensor; 
 a processor; 
 a memory; and 
 a media playback component, wherein the memory comprises computer readable code which, when executed by the processor, causes the system to:
 playback media, at a first moment in time and by the media playback component, with a first playback value of a playback characteristic, wherein the playback characteristic comprises at least one of the following: volume level, spectral content, brightness level, or white point; 
 determine, at a second moment in time after the first moment in time, a relationship value of a relationship characteristic between the electronic system and a second electronic system, wherein the relationship characteristic comprises position information for the electronic system in relation to the second electronic system; 
 transition, at a third moment in time after the second moment in time, playback of the media to the second electronic system, wherein the transition comprises stopping the playback of the media by the media playback component and starting playback of the media by the second electronic system; 
 receive, at a fourth moment in time after the transition and from the sensor of the electronic system, a second playback value of the playback characteristic of the media, the sensor sensing the second playback value during playback of the media by the second electronic system after the transition; 
 generate an adjustment instruction based on the relationship value and a comparison of the first playback value and the second playback value; and 
 transmit the adjustment instruction to the second electronic system, the adjustment instruction dictating an adjusted value of the playback characteristic for the media played back by the second electronic system at a fifth moment in time after the transition. 
 
 
     
     
       2. The system of  claim 1 , wherein the position information comprises one or more of:
 a distance between the system and the second electronic system; and 
 an orientation between the system and the second electronic system. 
 
     
     
       3. The system of  claim 1 , wherein the relationship value is determined during playback of the media with the first playback value by the media playback component of the system. 
     
     
       4. The system of  claim 1 , wherein the computer readable code, when executed by the processor, further causes the system to:
 determine, before the transition, an ambient value of the environment associated with the system, wherein the adjustment instruction is further based on the determined ambient value. 
 
     
     
       5. A method, comprising:
 playing back media, at a first moment in time and by a media playback component of a first electronic system, with a first playback value of a playback characteristic, wherein the playback characteristic comprises at least one of the following: volume level, spectral content, brightness level, or white point; 
 determining, at a second moment in time after the first moment in time, a relationship value of a relationship characteristic between the first electronic system and a second electronic system, wherein the relationship characteristic comprises position information for the first electronic system in relation to the second electronic system; 
 transitioning, at a third moment in time after the second moment in time, playback of the media to the second electronic system, wherein the transition comprises stopping the playback of the media by the media playback component of the first electronic system and starting playback of the media by a media playback component of the second electronic system; 
 receiving, at a fourth moment in time after the transition and from a sensor of the first electronic system, a second playback value of the playback characteristic of the media, the sensor sensing the second playback value during playback of the media by the media playback component of the second electronic system after the transition; 
 generating an adjustment instruction that is based, at least in part, on the relationship value and a comparison of the first playback value and the second playback value; and 
 transmitting the adjustment instruction to the second electronic system, the adjustment instruction dictating an adjusted value of the playback characteristic for the media played back by the second electronic system at a fifth moment in time after the transition. 
 
     
     
       6. The method of  claim 5 , wherein the position information comprises one or more of:
 a distance between the first and second electronic systems; and 
 an orientation between the first and second electronic systems. 
 
     
     
       7. The method of  claim 5 , wherein the relationship value is determined, at least partially, during playback of the media with the first playback value by the media playback component of the first electronic system. 
     
     
       8. The method of  claim 5 , further comprising:
 determining, before the transition, an ambient value of the environment associated with the first electronic system, wherein the adjustment instruction is further based on the determined ambient value. 
 
     
     
       9. A non-transitory computer readable medium storing data comprising instructions, the instructions executable by one or more processors to cause the one or more processors to:
 cause, at a first moment in time, a media playback component of a first electronic system to playback media with a first playback value of a playback characteristic, wherein the playback characteristic comprises at least one of the following: volume level, spectral content, brightness level, or white point; 
 determine, at a second moment in time after the first moment in time, a relationship value of a relationship characteristic between the first electronic system and a second electronic system, wherein the relationship characteristic comprises position information for the first electronic system in relation to the second electronic system; 
 cause, at a third moment in time after the second moment in time, the first electronic system to transition playback of the media to the second electronic system, wherein the transition comprises stopping the playback of the media by the media playback component of the first electronic system and starting playback of the media by a media playback component of the second electronic system; 
 receive, at a fourth moment in time after the transition and from a sensor of the first electronic system, a second playback value of the playback characteristic of the media, the sensor sensing the second playback value during playback of the media by the media playback component of the second electronic system after the transition; 
 generate an adjustment instruction that is based, at least in part, on the relationship value and a comparison of the first playback value and the second playback value; and 
 transmit the adjustment instruction to the second electronic system, the adjustment instruction dictating an adjusted value of the playback characteristic for the media played back by the second electronic system at a fifth moment in time after the transition. 
 
     
     
       10. The non-transitory computer readable medium of  claim 9 , wherein the position information comprises one or more of:
 a distance between the first electronic system and the second electronic system; and 
 an orientation between the first electronic system and the second electronic system. 
 
     
     
       11. The non-transitory computer readable medium of  claim 9 , wherein the relationship value is determined, at least partially, during playback of the media with the first playback value by the media playback component of the first electronic system. 
     
     
       12. The non-transitory computer readable medium of  claim 9 , wherein the instructions, when executed by the one or more processors, further cause the one or more processors to:
 determine, before the transition, an ambient value of the environment associated with the first electronic system, wherein the adjustment instruction is further based on the determined ambient value. 
 
     
     
       13. An electronic system, comprising:
 a processor; 
 a memory; and 
 a media playback component, wherein the memory comprises computer readable code which, when executed by the processor, causes the system to:
 playback, by the media playback component, media at a first moment in time using a first playback value of a playback characteristic of the media in response to the playback of the media being transitioned to the electronic system from a second electronic system at a second moment in time that is earlier than the first moment in time, wherein the playback characteristic comprises at least one of the following: volume level, spectral content, brightness level, or white point, and wherein the transition comprises stopping the playback of the media by a media playback component of the second electronic system and starting playback of the media by the media playback component of the electronic system; 
 receive, by the system, an adjustment instruction at a third moment in time after the transition and during the playback of the media by the media playback component of the electronic system, the adjustment instruction being generated based, at least in part, on a relationship value of a relationship characteristic between the electronic system and the second electronic system and on a comparison of the first playback value of the playback characteristic and a second playback value of the playback characteristic that is associated with the second electronic system, wherein the relationship characteristic comprises position information for the electronic system in relation to the second electronic system; and 
 adjust, during the playback of the media, the first playback value of the playback characteristic based on the adjustment instruction, wherein the adjustment instruction dictates an adjusted value of the playback characteristic for the media played back by the media playback component of the electronic system at a fourth moment in time after the transition. 
 
 
     
     
       14. The system of  claim 13 , wherein the position information comprises one or more of:
 a distance between the system and the second electronic system. 
 
     
     
       15. The system of  claim 13 , wherein the position information comprises an orientation between the system and the second electronic system. 
     
     
       16. The system of  claim 13 , wherein the first playback value of the playback characteristic is sensed by a sensor of the second electronic system after the transition. 
     
     
       17. The system of  claim 16 , wherein the first playback value is sensed based, at least in part, on instructing a user to maintain the sensor in a particular fashion with respect to the media playback component. 
     
     
       18. The system of  claim 16 , wherein the first playback value of the playback characteristic is sensed by the sensor after the transition. 
     
     
       19. A method, comprising:
 playing back, by a media playback component of a first electronic system, media at a first moment in time using a first playback value of a playback characteristic of the media in response to the playback of the media being transitioned to the first electronic system from a second electronic system at a second moment in time that is earlier than the first moment in time, wherein the playback characteristic comprises at least one of the following: volume level, spectral content, brightness level, or white point, and wherein the transition comprises stopping the playback of the media by a media playback component of the second electronic system and starting playback of the media by the media playback component of the first electronic system; 
 receiving, by the first electronic system, an adjustment instruction at a third moment in time after the transition and during the playback of the media by the media playback component of the first electronic system, the adjustment instruction being generated based, at least in part, on a relationship value of a relationship characteristic between the first and second electronic systems and on a comparison of the first playback value of the playback characteristic and a second playback value of the playback characteristic that is associated with the second electronic system, wherein the relationship characteristic comprises position information for the first electronic system in relation to the second electronic system; and 
 adjusting, during the playback of the media, the first playback value of the playback characteristic based on the adjustment instruction, wherein the adjustment instruction dictates an adjusted value of the playback characteristic for the media played back by the media playback component of the first electronic system at a fourth moment in time after the transition. 
 
     
     
       20. The method of  claim 19 , wherein the position information comprises a distance between the media playback component and the second electronic system. 
     
     
       21. The method of  claim 19 , wherein the position information comprises an orientation between the first electronic system and the second electronic system. 
     
     
       22. The method of  claim 19 , wherein the first playback value of the playback characteristic is sensed by a sensor of the second electronic system. 
     
     
       23. The method of  claim 22 , wherein the first playback value is sensed based, at least in part, on instructing a user to maintain the sensor in a particular fashion with respect to the media playback component of the first electronic system. 
     
     
       24. The method of  claim 22 , wherein the first playback value of the playback characteristic is sensed by the sensor after the transition. 
     
     
       25. A non-transitory computer readable medium storing data comprising instructions, the instructions executable by one or more processors to cause the one or more processors to:
 cause a media playback component of a first electronic system to playback media at a first moment in time using a first playback value of a playback characteristic of the media in response to the playback of the media being transitioned to the first electronic system from a second electronic system at a second moment in time that is earlier than the first moment, wherein the playback characteristic comprises at least one of the following: volume level, spectral content, brightness level, or white point, and wherein the transition comprises stopping the playback of the media by a media playback component of the second electronic system and starting playback of the media by the media playback component of the first electronic system; 
 receive an adjustment instruction at a third moment in time after the transition and during the playback of the media by the media playback component of the first electronic system, the adjustment instruction being generated based, at least in part, on a relationship value of a relationship characteristic between the first and second electronic systems and on a comparison of the first playback value of the playback characteristic and a second playback value of the playback characteristic that is associated with the second electronic system, wherein the relationship characteristic comprises position information for the first electronic system in relation to the second electronic system; and 
 adjust, during the playback of the media, the first playback value of the playback characteristic based on the adjustment instruction, wherein the adjustment instruction dictates an adjusted value of the playback characteristic for the media played back by the media playback component of the first electronic system at a fourth moment in time after the transition. 
 
     
     
       26. The non-transitory computer readable medium of  claim 25 , wherein the position information comprises a distance between the media playback component and the second electronic system. 
     
     
       27. The non-transitory computer readable medium of  claim 25 , wherein the position information comprises an orientation between the first electronic system and the second electronic system. 
     
     
       28. The non-transitory computer readable medium of  claim 25 , wherein the first playback value of the playback characteristic is sensed by a sensor of the second electronic system. 
     
     
       29. The non-transitory computer readable medium of  claim 28 , wherein the first playback value is sensed based, at least in part, on instructing a user to maintain the sensor in a particular fashion with respect to the media playback component of the first electronic system. 
     
     
       30. The non-transitory computer readable medium of  claim 28 , wherein the first playback value of the playback characteristic is sensed by the sensor after the transition.

Description:
TECHNICAL FIELD 
     This can relate to systems, methods, and computer-readable media for transitioning media playback between multiple electronic devices and, more particularly, to systems, methods, and computer-readable media for providing a consistent user experience when transitioning media playback between multiple electronic devices. 
     BACKGROUND 
     Some systems are configured to terminate the playback of media on a first electronic device and restart the playback of media on a second electronic device. However, the value of one or more playback characteristics of the played back media (e.g., the volume level of played back audio media) often dramatically changes when transitioning from the first electronic device to the second electronic device as each device is often configured to playback media using that device&#39;s own internal playback settings. 
     SUMMARY 
     Systems, methods, and computer-readable media for transitioning media playback between multiple electronic devices are provided. 
     In some embodiments, there is provided a system that may include a first electronic subsystem and a second electronic subsystem. The first electronic subsystem may be configured to playback first media with a first playback value of a first playback characteristic, determine a first relationship value of a first relationship characteristic between the first electronic subsystem and the second electronic subsystem, and transmit a first control instruction that is based on the determined first relationship value and the first playback value. The second electronic subsystem may be configured to receive the transmitted first control instruction and playback second media with a second playback value of the first playback characteristic. The second playback value may be based on the received first control instruction. 
     In other embodiments, there is provided a method that may include playing back first media with a first playback value of a first playback characteristic using a first electronic subsystem of a system, determining a first relationship value of a first relationship characteristic between the first electronic subsystem and a second electronic subsystem of the system, and playing back second media with a second playback value of the first playback characteristic using the second electronic subsystem. The second playback value may be based on the first playback value and the first relationship value. 
     In yet other embodiments, there is provided a system that may include a first electronic subsystem and a second electronic subsystem. The first electronic subsystem may include a first playback component, a first sensor, and a first communications component. The second electronic subsystem may include a second playback component and a second communications component. The first playback component may be configured to playback first media, the first electronic subsystem may be configured to determine a first playback value of a first playback characteristic of the first media when the first media is being played back by the first playback component, the second playback component may be configured to playback second media with an initial playback value of the first playback characteristic, the first sensor may be configured to determine a second playback value of the first playback characteristic of the second media when the second media is being played back by the second playback component with the initial playback value of the first playback characteristic, the first communications component may be configured to transmit a first adjustment instruction that may be based on a comparison of the determined first playback value and the determined second playback value, the second communications component may be configured to receive the transmitted first adjustment instruction, the second playback component may be configured to adjust the playback value of the first playback characteristic of the second media from the initial playback value of the first playback characteristic to an adjusted playback value of the first playback characteristic when the second media is being played back by the second playback component, and the adjusted playback value of the first playback characteristic may be based on the received first adjustment instruction. 
     In still yet other embodiments, there is provided a method that may include playing back first media using a first playback component of a first electronic subsystem, determining a first playback value of a first playback characteristic of the played back first media, playing back second media with an initial playback value of the first playback characteristic using a second playback component of a second electronic subsystem, and, during the playing back of the second media with the initial playback value, determining a second playback value of the first playback characteristic of the played back second media using a first sensor of the first electronic subsystem. The method may also include comparing the determined first playback value and the determined second playback value and, after the comparing, adjusting the playback value of the first playback characteristic of the second media from the initial playback value of the first playback characteristic to an adjusted playback value of the first playback characteristic using the second playback component when the second media is being played back by the second electronic subsystem. The adjusted playback value of the first playback characteristic may be based on the comparing. 
     In still yet other embodiments, there is provided a first electronic subsystem that may include a sensor component, a playback component, a communications component, and a processor coupled to the sensor component, the playback component, and the communications component. The playback component may be configured to playback first media. The sensor component may be configured to determine a first value of a first playback characteristic of the first media when the first media is played back by the playback component. The sensor component may be further configured to determine a second value of the first playback characteristic of second media when the second media is played back by a second electronic subsystem. The processor may be configured to generate a first adjustment instruction based on a comparison of the determined first value and the determined second value. The communications component may be configured to communicate the first adjustment instruction to the second electronic subsystem. 
     In still yet other embodiments, there is provided a first electronic subsystem that may include a playback component, a first communications component, and a processor coupled to the playback component and the communications component. The playback component may be configured to playback first media according to a first value of a first playback characteristic. The communications component may be configured to receive a first adjustment instruction from a second electronic subsystem during the playback of the first media according to the first value of the first playback characteristic. The processor may be configured to adjust the value of the first playback characteristic from the first value to a second value based on the received first adjustment instruction. The playback component may be further configured to playback the first media according to the second value based on the adjustment. 
     In still yet other embodiments, there is provided a method that may include determining a first value of a first playback characteristic of first media for playback with a first media playback component of a first electronic subsystem, playing back second media with an initial value of the first playback characteristic using a second media playback component of a second electronic subsystem when the second media playback component is positioned at a first location, determining a second value of the first playback characteristic of the played back second media using a first sensor of the first electronic subsystem when the first sensor is positioned at a second location, comparing the determined first value and the determined second value, and adjusting the value of the first playback characteristic of the second media from the initial value to an adjusted value using the second electronic subsystem. The adjusting the value may be based on the comparison. 
     In still yet other embodiments, there is provided a method for use in a system that includes a first electronic subsystem, a second electronic subsystem, and a third electronic subsystem. The method may include playing back first media with a first playback value of a first playback characteristic using the second electronic subsystem and, during the playing back of the first media, detecting an occurrence of a subsystem transition event using the first electronic subsystem. The method may also include, in response to the detection of the occurrence, playing back second media with a second playback value of the first playback characteristic using the third electronic subsystem. 
     In still yet other embodiments, there is provided a non-transitory computer-readable medium that includes computer-readable instructions recorded thereon for playing back first media on a first electronic subsystem, determining a first value of a first playback characteristic of the first media when the first media is played back on the first electronic subsystem, determining a second value of the first playback characteristic of second media when the second media is played back on a second electronic subsystem, comparing the determined first value and the determined second value, generating a first adjustment instruction based on the comparison, and communicating the first adjustment instruction from the first electronic subsystem to the second electronic subsystem. 
     In still yet other embodiments, there is provided a non-transitory computer-readable medium that includes computer-readable instructions recorded thereon for playing back first media on a first electronic subsystem according to a first value of a first playback characteristic, receiving with the first electronic subsystem a first adjustment instruction from a second electronic subsystem during the playback of the first media according to the first value of the first playback characteristic, adjusting the value of the first playback characteristic from the first value to a second value based on the received first adjustment instruction, and playing back the first media on the first electronic subsystem according to the second value based on the adjustment. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects of the disclosure, its nature, and various features will become more apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout, and in which: 
         FIG. 1  is a schematic view of an illustrative system for transitioning media playback between multiple electronic devices, in accordance with some embodiments; 
         FIG. 2  is a schematic view of illustrative portions of the system of  FIG. 1 , in accordance with some embodiments; 
         FIG. 3  is an additional view of the system of  FIGS. 1 and 2 , in accordance with some embodiments; 
         FIG. 3A  is an overhead views of the system of  FIGS. 1-3 , taken from line IIIA-IIIA of  FIG. 3 , in accordance with some embodiments; 
         FIG. 3B  is an overhead views of the system of  FIGS. 1-3 , taken from line IIIB-IIIB of  FIG. 3 , in accordance with some embodiments; 
         FIG. 3C  is an overhead views of the system of  FIGS. 1-3 , taken from line IIIC-IIIC of  FIG. 3 , in accordance with some embodiments; 
         FIGS. 4-7  are flowcharts of illustrative processes for transitioning media playback between multiple electronic devices, in accordance with various embodiments; 
         FIG. 8  is a block diagram of an illustrative application programming interface (“API”) architecture, in accordance with some embodiments; and 
         FIG. 9  is a block diagram of an illustrative API software stack, in accordance with some embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     Systems, methods, and computer-readable media for transitioning media playback between multiple electronic devices are provided and described with reference to  FIGS. 1-9 . 
       FIG. 1  is a schematic view of an illustrative system  1  for transitioning media playback between multiple electronic devices in accordance with some embodiments of the invention. System  1  may include a first electronic subsystem  10  and a second electronic subsystem  20 . System  1  may also include a communications set-up  55 , through which first electronic subsystem  10  and second electronic subsystem  20  may communicate with one another. Such communication may facilitate a transition from using first electronic subsystem  10  to using second electronic subsystem  20  for playing back media to a user of system  1 . 
     Each one of first electronic subsystem  10  and second electronic subsystem  20  may be configured to playback media that may be accessible from one or more media sources. Moreover, first electronic subsystem  10  may be configured to detect a first value of a playback characteristic of media played back by first electronic subsystem  10  at a first moment in time before a transition and a second value of the playback characteristic of media played back by second electronic subsystem  20  at a second moment in time after the transition, while second electronic subsystem  20  may be configured to adjust the value of the playback characteristic of the media played back by second electronic subsystem  20  at a third moment in time after the transition based on a comparison of the detected first and second values. This adjustment may allow for the media played back by second electronic subsystem  20  at the third moment in time to have at least one playback characteristic value in common with the media played back by first electronic subsystem  10  at the first moment in time. For example, this adjustment may allow for the volume level of the media played back by second electronic subsystem  20  as detected by first electronic subsystem  10  at the third moment in time to be the same as the volume level of the media played back by first electronic subsystem  10  as detected by first electronic subsystem  10  at the first moment in time, thereby providing a consistent experience for a user of system  1  (e.g., a user proximate to first electronic subsystem  10 ) as the playback of media is transitioned from first electronic subsystem  10  to second electronic subsystem  20 . 
     For example, in some embodiments, as shown in  FIG. 1 , first electronic subsystem  10  may include a first electronic device  100  and second electronic subsystem  20  may include a second electronic device  200 . Either one or both of first electronic device  100  and second electronic device  200  can include, but is not limited to, a music player (e.g., an iPod™ available by Apple Inc. of Cupertino, Calif.), video player, still image player, game player, other media player, music recorder, movie or video camera or recorder, still camera, other media recorder, radio, medical equipment, domestic appliance, transportation vehicle instrument, musical instrument, calculator, cellular telephone (e.g., an iPhone™ available by Apple Inc.), other wireless communication device, personal digital assistant, remote control, pager, computer (e.g., a desktop, laptop, tablet, server, etc.), monitor, television, stereo equipment, set up box, set-top box, boom box, modem, router, printer, or any combination thereof. In some embodiments, either one or both of first electronic device  100  and second electronic device  200  may perform a single function (e.g., a device dedicated to playing back media) and, in other embodiments, either one or both of first electronic device  100  and second electronic device  200  may perform multiple functions (e.g., a device that plays back media, and receives and transmits telephone calls). 
     Either one or both of first electronic device  100  and second electronic device  200  may be any portable, mobile, hand-held, or miniature electronic device that may be configured to playback media wherever a user travels. Some miniature electronic devices may have a form factor that is smaller than that of hand-held electronic devices, such as an iPod™. Illustrative miniature electronic devices can be integrated into various objects that may include, but are not limited to, watches, rings, necklaces, belts, accessories for belts, headsets, accessories for shoes, virtual reality devices, glasses, other wearable electronics, accessories for sporting equipment, accessories for fitness equipment, key chains, or any combination thereof. Alternatively, either one or both of first electronic device  100  and second electronic device  200  may not be portable at all, but may instead be generally stationary. 
     As shown in  FIG. 1 , for example, first electronic device  100  of first electronic subsystem  10  may include a processor  102 , memory  104 , first communications component  106 , power supply  108 , input component  110 , media playback component  112 , sensor  114 , and second communications component  116 . First electronic device  100  may also include a bus  118  that may provide one or more wired or wireless communications links or paths for transferring data and/or power to, from, or between various other components of first electronic device  100 . In some embodiments, one or more components of first electronic device  100  may be combined or omitted. Moreover, first electronic device  100  may include other components not combined or included in  FIG. 1  and/or several instances of the components shown in  FIG. 1 . For the sake of simplicity, only one of each of the components of first electronic device  100  is shown in  FIG. 1 . 
     Memory  104  of first electronic device  100  may include one or more storage mediums, including for example, a hard-drive, flash memory, permanent memory such as read-only memory (“ROM”), semi-permanent memory such as random access memory (“RAM”), any other suitable type of storage component, or any combination thereof. Memory  104  may include cache memory, which may be one or more different types of memory used for temporarily storing data for electronic device applications. Memory  104  may store media data (e.g., music and image files), software (e.g., for implementing functions on first electronic device  100 ), firmware, preference information (e.g., media playback preferences), lifestyle information (e.g., food preferences), exercise information (e.g., information obtained by exercise monitoring equipment), transaction information (e.g., information such as credit card information), wireless connection information (e.g., information that may enable first electronic device  100  to establish a wireless connection), subscription information (e.g., information that keeps track of podcasts or television shows or other media a user subscribes to), contact information (e.g., telephone numbers and e-mail addresses), calendar information, any other suitable data, or any combination thereof. 
     First communications component  106  of first electronic device  100  may be provided to allow first electronic device  100  to communicate with one or more other electronic subsystems, electronic devices, or servers (e.g., second electronic device  200  and/or a server  70  of a communications network  50  of communications set-up  55 ) using any suitable wired or wireless communications protocol. For example, first communications component  106  may support Wi-Fi (e.g., an 802.11 protocol), ZigBee (e.g., an 802.15.4 protocol), WiDi™, Ethernet, Bluetooth™, Bluetooth™ Low Energy (“BLE”), high frequency systems (e.g., 900 MHz, 2.4 GHz, and 5.6 GHz communication systems), infrared, transmission control protocol/internet protocol (“TCP/IP”) (e.g., any of the protocols used in each of the TCP/IP layers), Stream Control Transmission Protocol (“SCTP”), Dynamic Host Configuration Protocol (“DHCP”), hypertext transfer protocol (“HTTP”), BitTorrent™, file transfer protocol (“FTP”), real-time transport protocol (“RTP”), real-time streaming protocol (“RTSP”), real-time control protocol (“RTCP”), Remote Audio Output Protocol (“RAOP”), Real Data Transport Protocol™ (“RDTP”), User Datagram Protocol (“UDP”), secure shell protocol (“SSH”), wireless distribution system (“WDS”) bridging, any communications protocol that may be used by wireless and cellular telephones and personal e-mail devices (e.g., Global System for Mobile Communications (“GSM”), GSM plus Enhanced Data rates for GSM Evolution (“EDGE”), Code Division Multiple Access (“CDMA”), Orthogonal Frequency-Division Multiple Access (“OFDMA”), high speed packet access (“HSPA”), multi-band, etc.), any communications protocol that may be used by a low power Wireless Personal Area Network (“6LoWPAN”) module, any other communications protocol, or any combination thereof. First communications component  106  may be configured to enable first electronic device  100  to be electrically coupled to one or more other electronic subsystems, electronic devices, or servers (e.g., second electronic device  200  and/or server  70  of communications network  50  and/or a host computer or an accessory device) and to communicate with that other entity, either wirelessly or via a wired connection. 
     Second communications component  116  of first electronic device  100  may be provided to allow first electronic device  100  to communicate with one or more other devices of first electronic subsystem  10  (e.g., a first accessory device  180 ) using any suitable wired or wireless communications protocol. For example, second communications component  116  may support any one or more of the protocols described above with respect to first communications component  106 . Second communications component  116  may be configured to enable first electronic device  100  to be electrically coupled to one or more other devices of first electronic subsystem  10  and to communicate with that other device, either wirelessly or via a wired connection. 
     Power supply  108  of first electronic device  100  may provide power to one or more of the components of first electronic device  100 . In some embodiments, power supply  108  can be coupled to a power grid (e.g., when first electronic device  100  is not a portable device, such as a desktop computer). In some embodiments, power supply  108  can include one or more batteries for providing power (e.g., when first electronic device  100  is a portable device, such as a cellular telephone). As another example, power supply  108  can be configured to generate power from a natural source (e.g., solar power using solar cells). 
     One or more input components  110  of first electronic device  100  may be provided to permit a user to interact or interface with first electronic device  100 . For example, input component  110  can take a variety of forms, including, but not limited to, a touch pad, dial, click wheel, scroll wheel, touch screen, one or more buttons (e.g., a keyboard), mouse, joy stick, track ball, microphone, camera, motion sensor, proximity sensor, light detector, and combinations thereof. Each input component  110  can be configured to provide one or more dedicated control functions for making selections or issuing commands associated with operating first electronic device  100 . 
     First electronic device  100  may also include one or more output components that may present information (e.g., visual, audible, and/or tactile information) to a user of first electronic device  100 . An output component of first electronic device  100  may take various forms, including, but not limited to, audio speakers, headphones, audio lines-out, visual displays, video lines-out, antennas, infrared ports, rumblers, vibrators, or combinations thereof. 
     For example, as shown in  FIG. 1 , first electronic device  100  may include media playback component  112  as an output component. Media playback component  112  may include any suitable type of output interface for presenting aural and/or visual data to a user. In some embodiments, media playback component  112  may include any suitable type of visual display, including, but not limited to, a liquid crystal display (“LCD”), a light emitting diode (“LED”) display, an organic light-emitting diode (“OLED”) display, a surface-conduction electron-emitter display (“SED”), a carbon nanotube display, a nanocrystal display, any other suitable type of display, or combination thereof. Alternatively, media playback component  112  can include a movable display or a projecting system for providing a display of content on a surface remote from first electronic device  100 , such as, for example, a video projector, a head-up display, or a three-dimensional (e.g., holographic) display. As another example, media playback component  112  may include a digital or mechanical viewfinder, such as a viewfinder of the type found in compact digital cameras, reflex cameras, or any other suitable still or video camera. Alternatively or additionally, in some embodiments, media playback component  112  may include any suitable type of aural output, including, but not limited to, a loudspeaker, a headphone, or combination thereof. In some embodiments, media playback component  112  may include driver circuitry, circuitry for driving output drivers, or both. Media playback component  112  can be operative to output the playback media content that may be under the direction of processor  102  to an environment external to first electronic device  100  for receipt by a user. 
     It should be noted that one or more input components  110  and one or more output components  112  may sometimes be referred to collectively herein as an input/output (“I/O”) component or I/O interface (e.g., input component  110  and display  112  as I/O component or I/O interface  111 ). For example, input component  110  and media playback component  112  may sometimes be a single I/O component  111 , such as a touch screen, that may receive input information through a user&#39;s touch of a display screen and that may also provide visual information to a user via that same display screen. 
     Sensor  114  of first electronic device  100  may include any suitable sensor that may be operative to determine the value of one or more characteristics of played back media that may be detected in the environment of first electronic device  100 . For example, sensor  114  may be a microphone or any other suitable audio sensor that may be configured to detect the value of one or more characteristics of played back audio media, such as the volume level, the spectral content, and the like. Additionally or alternatively, sensor  114  may be a light sensor or any other suitable video sensor that may be configured to detect the value of one or more characteristics of played back video media, such as the brightness level, white point, the spectral content, and the like. 
     Processor  102  of first electronic device  100  may include any processing circuitry that may be operative to control the operations and performance of one or more components of first electronic device  100 . For example, processor  102  may receive input signals from input component  110  and/or drive output signals through media playback component  112 . In some embodiments, as shown in  FIG. 1 , processor  102  may be used to run one or more applications, such as an application  103 . Application  103  may include, but is not limited to, one or more operating system applications, firmware applications, media playback applications, media editing applications, or any other suitable applications. For example, processor  102  may load application  103  as a user interface program to determine how instructions or data received via an input component  110  or other component of device  100  may manipulate the way in which information is stored and/or provided to the user via an output component  112  (e.g., media playback component  112 ). Application  103  may be accessed by processor  102  from any suitable source, such as from memory  104  (e.g., via bus  118 ), from second electronic subsystem  20  (e.g., via communications set-up  55  and first communications component  106 ) or from server  70  of communications network  50  (e.g., via first communications component  106 ), or from any other suitable source. 
     First electronic device  100  may also be provided with a housing  101  that may at least partially enclose one or more of the components of first electronic device  100  for protection from debris and other degrading forces external to first electronic device  100 . In some embodiments, one or more of the components of first electronic device  100  may be provided within its own housing (e.g., input component  110  may be an independent keyboard or mouse within its own housing that may wirelessly or through a wire communicate with processor  102 , which may be provided within its own housing). 
     As also shown in  FIG. 1 , for example, second electronic device  200  of second electronic subsystem  20  may include a processor  202 , memory  204 , first communications component  206 , power supply  208 , input component  210 , media playback component  212 , sensor  214 , and second communications component  216 . In some embodiments, input component  210  and media playback component  212  of second electronic device  200  may sometimes be a single I/O interface or I/O component  211 . Second electronic device  200  may also include a housing  201  as well as a bus  218  that may provide one or more wired or wireless communications links or paths for transferring data and/or power to, from, or between various other components of second electronic device  200 . As also shown in  FIG. 1 , processor  202  may be used to run an application  203  that may include, but is not limited to, one or more operating system applications, firmware applications, media playback applications, media editing applications, or any other suitable applications. Application  203  may be accessed by processor  202  from any suitable source, such as from memory  204  (e.g., via bus  218 ), from first electronic subsystem  10  or from server  70  of communications network  50  (e.g., via communications set-up  55  and first communications component  206 ), or from any other suitable source. In some embodiments, one or more components of second electronic device  200  may be combined or omitted. Moreover, second electronic device  200  may include other components not combined or included in  FIG. 1  and/or several instances of the components shown in  FIG. 1 . For the sake of simplicity, only one of each of the components of second electronic device  200  is shown in  FIG. 1 . 
     Each one of housing  201 , processor  202 , application  203 , memory  204 , first communications component  206 , power supply  208 , input component  210 , I/O component  211 , media playback component  212 , sensor  214 , second communications component  216 , and bus  218  of second electronic device  200  may be the same as or substantially similar to a respective one of housing  101 , processor  102 , application  103 , memory  104 , first communications component  106 , power supply  108 , input component  110 , I/O component  111 , media playback component  112 , sensor  114 , second communications component  116 , and bus  118  of first electronic device  100  and, therefore, may not be independently described in greater detail. While, in some embodiments, first electronic device  100  and second electronic device  200  may be the same or substantially similar devices, in other embodiments, first electronic device  100  may have one or more different and/or additional components that second electronic device  200  does not have, and vice versa. 
     In some embodiments, first communications component  106  of first electronic device  100  and first communications component  206  of second electronic device  200  may communicate with one another directly, such as, for example, via a shared communications link  51  of communications set-up  55 . Shared communications link  51  may include one or more wired and/or wireless communications links or paths for transferring any suitable data and/or power between first electronic device  100  and second electronic device  200 . Alternatively or additionally, in some embodiments, system  1  may include communications network  50 , with which one or both of first electronic device  100  and second electronic device  200  may communicate. For example, a first electronic device communications link  61  of communications set-up  55  may include one or more wired and/or wireless communications links or paths for transferring any suitable data and/or power between first communications component  106  of first electronic device  100  and communications network  50 . Similarly, a second electronic device communications link  71  of communications set-up  55  may include one or more wired and/or wireless communications links or paths for transferring any suitable data and/or power between first communications component  206  of second electronic device  200  and communications network  50 . In some embodiments, as an alternative or in addition to communicating with one another directly via shared communications link  51 , first electronic device  100  and second electronic device  200  may communicate with one another via communications network  50  and communications links  61  and  71 . 
     Any suitable circuitry, device, system, or combination of these (e.g., a wireless communications infrastructure including one or more communications towers, telecommunications servers, or the like) operative to create a communications network may be used to provide communications network  50 . Communications network  50  may be capable of providing communications using any suitable wired or wireless communications protocol. For example, communications network  50  may support Wi-Fi (e.g., an 802.11 protocol), ZigBee (e.g., an 802.15.4 protocol), WiDi™, Ethernet, Bluetooth™, BLE, high frequency systems (e.g., 900 MHz, 2.4 GHz, and 5.6 GHz communication systems), infrared, TCP/IP, SCTP, DHCP, HTTP, BitTorrent™, FTP, RTP, RTSP, RTCP, RAOP, RDTP, UDP, SSH, WDS-bridging, any communications protocol that may be used by wireless and cellular telephones and personal e-mail devices (e.g., GSM, GSM plus EDGE, CDMA, OFDMA, HSPA, multi-band, etc.), any communications protocol that may be used by a low power Wireless Personal Area Network (“6LoWPAN”) module, any other communications protocol, or any combination thereof. 
     Moreover, in some embodiments, communications network  50  may include one or more servers  70  or any other suitable components (e.g., any suitable cloud computing components) that may communicate with first electronic device  100  and/or second electronic device  200  via communications network  50 . In some embodiments, server  70  may be a source of one or more files, applications, media, or any other suitable resource (e.g., application  103  and/or application  203 ) that may be provided to and utilized by first electronic device  100  and/or second electronic device  200 . For example, server  70  may be configured as a media store that may provide first electronic device  100  and/or second electronic device  200  with various resources or media items including, but not limited to, audio media files, video media files, text files, graphical object files, various other multimedia files, various applications (e.g., a media playback balancing application), various types of metadata or playback control data (e.g., data that may at least partially dictate the volume, brightness, white point, or value of any other playback characteristic of media to be played back by subsystem  10  and/or subsystem  20 ), and the like. An example of such a media store that may be provided by server  70  may be the iTunes™ Store and/or the App Store™, each of which is made available by Apple Inc. of Cupertino, Calif. 
     It should be noted that any mechanism or combination of mechanisms for enabling communication between first communications component  106  of first electronic device  100  and first communications component  206  of second electronic device  200  may sometimes be referred to collectively herein as a communications set-up. For example, as shown in  FIG. 1 , shared communications link  51 , first electronic device communications link  61 , second electronic device communications link  71 , communications network  50 , and/or server  70  may be referred to individually and/or collectively as communications set-up  55 . 
     System  1  may be configured in various ways and may include various combinations of various devices while still providing a consistent user experience when transitioning media playback between multiple electronic devices (e.g., while still providing a consistent experience for a user proximate to first electronic subsystem  10  as the playback of media is switched from first electronic subsystem  10  to second electronic subsystem  20 ). For example, in some embodiments, first electronic subsystem  10  may only include first electronic device  100  without any accessory device (e.g., without first accessory device  180 , described in more detail below) and second electronic subsystem  20  may only include second electronic device  200  without any accessory device (e.g., without second accessory device  280 , described in more detail below). 
     In such embodiments, first electronic device  100  may include any suitable device that may be configured to playback media and determine a first value of a playback characteristic of the media played back by first electronic device  100  that may be detected in the environment of first electronic device  100  at a first moment in time before a media playback transition. First electronic device  100  may also be configured to share certain initial information with second electronic device  200  for dictating an initial value of the playback characteristic for media initially played back by second electronic device  200  at a second moment in time initially after the media playback transition. Moreover, first electronic device  100  may also be configured to determine a second value of the playback characteristic of the media initially played back by second electronic device  200  that may be detected in the environment of first electronic device  100  at a third moment in time after the media playback transition, and then share certain adjustment information with second electronic device  200  based on the determined first and second values for dictating an adjusted value of the playback characteristic for media played back by second electronic device  200  at a fourth moment in time after the media playback transition. While, in such embodiments, second electronic device  200  to initially playback media with a certain initial playback characteristic value based on the shared initial information and then adjust the playback characteristic value of the media played back by second electronic device  200  based on the shared adjustment information. For example, in such embodiments, first electronic device  100  may be any suitable device having media playback component  112 , media sensor  114 , and first communications component  106  that can share information via communications set-up  55  with first communications component  206  of second electronic device  200 , which may also include media playback component  212  (e.g., as shown in  FIGS. 2 and 3 ). 
       FIG. 2  shows a schematic view of a first device control system  301  of first electronic device  100  that may be provided to at least partially control not only the playback of media by first electronic device  100  but also the playback of media by second electronic device  200  during a media playback transition of system  1 . For example, in some embodiments, first device control system  301  may at least partially dictate the value of one or more media playback characteristics of media being played back by media playback component  112  of first electronic device  100  before a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . Moreover, in some embodiments, first device control system  301  may also at least partially dictate the value of one or more media playback characteristics of media being played back by media playback component  212  of second electronic device  200  after the media playback transition (e.g., based on a media playback characteristic value sensed by first device control system  301 ). This may enable a consistent user experience for a user within system  1  when the playback of media is transitioned from first electronic subsystem  10  to second electronic subsystem  20  (e.g., a user who is proximate to first electronic subsystem  10  within system  1 ). For example, as shown in  FIG. 3 , a user U of system  1  may be holding first electronic device  100  of subsystem  10  at a first location L 1  while second electronic device  200  of second subsystem  20  may be positioned on a stationary table T at a second location L 2  that may be separated from first location L 1  by a distance D, and first device control system  301  of first electronic device  100  may be configured to dictate and sense media playback characteristic values of media  121  played back by first electronic device  100  as well as sense and dictate media playback characteristic values of media  221  played back by second electronic device  200 . 
     With continued reference to  FIG. 2 , first device control system  301  of first electronic device  100  may include a media playback module  302  that may be configured to receive media for playback from one or more media sources. Media playback module  302  may also be configured to receive playback control data from one or more control sources. Moreover, media playback module  302  may also be configured to process such received media and such received control data in order to provide controlled media information to media playback component  112  for output to a user of first electronic subsystem  10 . 
     Media playback module  302  may receive media for playback from various media sources accessible to first electronic device  100 . For example, as shown in  FIG. 2 , media playback module  302  may receive stored media  303  for playback from a stored media source  304 , which may be a source of media local to first electronic device  100  (e.g., media source  304  may be memory  104  of first electronic device  100  and stored media  303  may be any suitable media stored thereon). As another example, media playback module  302  may receive first streamed media  305  for playback from any suitable streaming media source accessible via first communications component  106  from communications set-up  55  (e.g., server  70  or second electronic device  200  may be a streaming media source that may provide first streamed media  305  to media playback module  302  of first electronic device  100 ). The received media may be any suitable media for playback by first electronic device  100 , such as video media, audio media, graphical media, and the like. 
     Media playback module  302  may receive playback control data from various control sources accessible to first electronic device  100 . For example, as shown, media playback module  302  may receive inputted playback control data  307  from input component  110  of first electronic device  100  (e.g., inputted playback control data  307  may be determined by a user&#39;s interaction with a user interface of first electronic device  100 , such as a user&#39;s pressing of a “volume up” button  110  of first electronic device  100 ). As another example, as shown in  FIG. 2 , media playback module  302  may receive stored control data  319  from a stored control data source  308 , which may be a source of control data local to first electronic device  100  (e.g., control data source  308  may be memory  104  of first electronic device  100  and stored control data  319  may be any suitable control data stored thereon). Therefore, such playback control data may be based on the one or more applications being run by first electronic device  100  (e.g., application  103 ) and/or based on any input instructions being received by first electronic device  100  (e.g., via input component  110 ). The received playback control data may be any suitable instructions for controlling the value of any suitable media playback characteristic, such as the volume level of played back audio media, the brightness or white point of played back video media, and/or the spectral content of the played back media. 
     Media playback module  302  may process the received media and the received playback control data to generate and transmit controlled media information to media playback component  112  for output to a user of first electronic device  100 . For example, as shown, regardless of the source or type of media received by media playback module  302 , and regardless of the source or type of playback control data received by media playback module  302 , controlled media information  309  may be generated by media playback module  302  and transmitted to media playback component  112 . This controlled media information  309  may be received by media playback component  112  and may be outputted by media playback component  112  as first played back media  121 , which may be experienced by a user of first electronic device  100  (e.g., a user may hear first played back audio media  121  via a loud speaker media playback component  112  and/or a user may see first played back video media  121  via a display media play back component  112 ). Media playback module  302  may continuously update controlled media information  309  with different playback control data as new playback control data is received by media playback module  302 , such that the value of one or more playback characteristics of first played back media  121  may be continuously changed during playback of media to a user using first electronic device  100 . 
     As mentioned, at some point, system  1  may be configured to transition the playback of media from first electronic subsystem  10  to second electronic subsystem  20  (e.g., from first electronic device  100  to second electronic device  200 ). So that the value of at least one playback characteristic of the media played back by first electronic subsystem  10  before the transition may be maintained (e.g., at a particular location of first electronic subsystem  10 ) for the media played back by second electronic subsystem  20  after the transition, first device control system  301  of first electronic device  100  may also be configured to determine the value of a media playback characteristic of first played back media  121  before the transition, and then at least partially dictate the value of that media playback characteristic for second played back media  221  being played back by media playback component  212  of second electronic device  200  after the transition. This may provide for a consistent user experience for a user proximate to first electronic subsystem  10  within system  1  (e.g., user U that may be carrying first electronic device  100  within a space that may also include second electronic device  200  on table T, as shown in  FIG. 3 ). 
     A media playback transition from first electronic subsystem  10  to second electronic subsystem  20  may be initiated in response to any suitable media playback transition initiation event. For example, a transition initiation event may be an instruction received by first electronic device  100  from a user via input component  110 , from second electronic device  200 , from server  70 , or from any other suitable source. For example, a transition initiation event may occur in response to a user of first electronic device  100  requesting via input component  110  that media be played back from second electronic subsystem  20  rather than first electronic subsystem  10 . Alternatively, a transition initiation event may occur automatically in response to system  1  detecting that first electronic subsystem  10  and second electronic subsystem  20  are within a certain distance of one another (e.g., automatically once user U carries first electronic device  100  within a particular distance D of second electronic device  200 , such as automatically once a user listening to music on his portable media player device  100  gets in his car equipped with a car stereo subsystem  20 ). Therefore, such a media playback transition initiation event may be provided based on one or more applications being run by first electronic device  100  (e.g., application  103 ), based on any input instructions being received by first electronic device  100  (e.g., via input component  110 ), based on one or more applications being run by second electronic device  200  (e.g., application  203 ), based on any input instructions being received by second electronic device  200  (e.g., via input component  210 ), based on any instruction generated by server  70 , or any combination thereof. 
     A media playback transition initiation event may occur at any suitable time. For example, a transition initiation event may occur while media is being played back by first electronic subsystem  10  (e.g., while first played back media  121  is being output by media playback component  110 ) or after media has stopped being played back by first electronic subsystem  10  (e.g., after the completion of first played back media  121  being outputted by media playback component  110 ). Media being played back by first electronic subsystem  10  before the transition (e.g., first played back media  121 ) and media being played back by second electronic subsystem  20  after the transition (e.g., second played back media  221 ) may be accessed from the same media source or different media sources. In response to a media playback transition initiation event, system  1  may be configured to initiate the playback of media at second electronic subsystem  20  (e.g., the playback of second played back media  221  outputted from media playback component  212  of second electronic device  200  may be initiated). Moreover, in some embodiments, in response to a media playback transition initiation event, system  1  may be configured to terminate the playback of media at first electronic subsystem  20  (e.g., the playback of first played back media  121  outputted from media playback component  112  of first electronic device  100  may be terminated). 
     As shown in  FIG. 2 , for example, first device control system  301  of first electronic device  100  may also include a media transition module  306  that may be configured to determine a first playback characteristic value of media played back by first electronic subsystem  10  before a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . Media transition module  306  may also be configured to dictate an initial playback characteristic value of media played back by second electronic subsystem  20  after the media playback transition. Moreover, media transition module  306  may also be configured to determine a second playback characteristic value of media played back by second electronic subsystem  20  after the media playback transition and then dictate an adjustment to the playback characteristic value of the media played back by second electronic subsystem  20  based on the determined first and second playback characteristic values. 
     Media transition module  306  may determine a first playback characteristic value of media played back by first electronic subsystem  10  before a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . For example, as shown, media transition module  306  may be configured to receive first sensed playback characteristic value data  311  from sensor  114  of first electronic device  100 . First sensed playback characteristic value data  311  may be generated by sensor  114  based on the sensed value of a playback characteristic of first played back media  121  before a media playback transition. For example, sensor  114  may be a microphone configured to sense the volume of first played back audio media  121  and transmit first sensed playback characteristic value data  311  indicative of that sensed volume to media transition module  306 . As another example, sensor  114  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of first played back video media  121  and transmit first sensed playback characteristic value data  311  indicative of that sensed brightness or white point or any other suitable characteristic to media transition module  306 . 
     Additionally or alternatively, media transition module  306  may be configured to receive first internal playback characteristic value data  313  from within first device control system  301 . For example, first internal playback characteristic value data  313  may be internally generated by media playback module  302  based on a playback characteristic value of controlled media information  309  before a media playback transition. For example, media playback module  302  may be configured to determine what a sensed playback characteristic value of controlled media information  309  would be when outputted by media playback component  112  without requiring that value to be physically sensed by sensor  114  (e.g., media playback module  302  may leverage known controlled media information  309  with known characteristics of media playback component  112  to internally determine a playback characteristic value of first played back media  121  outputted by component  112  and thereby generate first internal playback characteristic value data  313 ). 
     Media transition module  306  may be configured to determine at least a first playback characteristic value of first played back media  121  played back by first electronic subsystem  10  at any suitable time (e.g., using received first sensed playback characteristic value data  311  and/or received first internal playback characteristic value data  313 ). For example, in response to first electronic subsystem  10  detecting a media playback transition initiation event from any suitable component of system  1 , media transition module  306  may be configured to determine the most recent playback characteristic value of first played back media  121  played back by first electronic subsystem  10  based on the most recently received first sensed playback characteristic value data  311  and/or the most recently received first internal playback characteristic value data  313 . Such playback characteristic value data may be configured to be generated and transmitted to media transition module  306  on a frequent basis so that the playback characteristic value data most recently received by media transition module  306  may be indicative of at least the first playback characteristic value of the current or most recently played back media  121 . 
     Media transition module  306  may also be configured to dictate an initial playback characteristic value of media played back by second electronic subsystem  20  after the media playback transition (e.g., in response to first electronic subsystem  10  detecting a media playback transition initiation event from any suitable component of system  1 ). For example, as shown, media transition module  306  may be configured to generate and transmit shared initial playback control data  315  to second electronic subsystem  20  (e.g., using communications set-up  55  via first communications component  106 ). Shared initial playback control data  315  may be generated by media transition module  306  based on various factors and may be received by second electronic subsystem  20  to dictate how second electronic subsystem  20  initially plays back second played back media  221  in response to the media playback transition. 
     Media transition module  306  may receive information from various sources and may generate appropriate shared initial playback control data  315  in response to analyzing the received information. For example, in some embodiments, media transition module  306  may generate shared initial playback control data  315  at least partially based on a first playback characteristic value of first played back media  121  played back by first electronic subsystem  10  (e.g., based on received first sensed playback characteristic value data  311  and/or received first internal playback characteristic value data  313 ). That is, shared initial playback control data  315  may be determined at least in part by the most recent playback characteristic value of first played back media  121  played back by first electronic subsystem  10  before the media playback transition, such that a playback characteristic value of second played back media  221  that may be initially played back by second electronic subsystem  20  after the media playback transition may be at least partially dictated by (e.g., similar to) the value of that playback characteristic of first played back media  121  played back by first electronic subsystem  10  before the media playback transition. For example, media transition module  306  may be configured to generate shared initial playback control data  315  that may be utilized by second electronic subsystem  20  to output second played back media  221  with a playback characteristic value substantially equal to or otherwise related to a first playback characteristic value of first played back media  121  played back by first electronic subsystem  10  (e.g., based on received first sensed playback characteristic value data  311  and/or received first internal playback characteristic value data  313 ). This may help enable a consistent user experience for a user of system  1  experiencing the media during the media playback transition. 
     Alternatively or additionally, media transition module  306  may generate shared initial playback control data  315  at least partially based on one or more characteristics of an ambient condition A sensed within system  1  during the media playback transition. Ambient condition A may be any condition (e.g., sound and/or light) in the environment of system  1  that is not generated by a media playback component. For example, ambient condition A may be generated by user U or any other entity that may be present within the environment of system  1  (e.g., user U may be utilizing system  1  at a party where the user wishes to playback music from a stereo second electronic device  200  rather than from a portable media player first electronic device  100 , and where ambient condition A may be conversational audio noise generated by the attendees of the party). As shown in  FIG. 2 , for example, media transition module  306  may be configured to receive sensed ambient characteristic value data  317  from sensor  114  of first electronic device  100 . Sensed ambient characteristic value data  317  may be generated by sensor  114  based on the sensed value of a characteristic of ambient condition A during a media playback transition. For example, sensor  114  may be a microphone configured to sense the volume of an audio component of ambient condition A (e.g., speech S from user U of  FIG. 3 ) and transmit sensed ambient characteristic value data  317  indicative of that sensed volume to media transition module  306 . As another example, sensor  114  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of a light component of ambient condition A (e.g., a light source G of  FIG. 3 ) and transmit sensed ambient characteristic value data  317  indicative of that sensed brightness or white point or any other suitable characteristic to media transition module  306 . 
     Media transition module  306  may be configured to determine one or more characteristics of an ambient condition A at any suitable time (e.g., using received sensed ambient characteristic value data  317 ). For example, in response to first electronic subsystem  10  detecting a media playback transition initiation event from any suitable component of system  1 , media transition module  306  may be configured to determine sensed ambient characteristic value data  317  just before second electronic subsystem  20  initiates media playback of second played back media  221  in accordance with the media playback transition. In some embodiments, media transition module  306  may be configured to determine sensed ambient characteristic value data  317  just after first electronic device  100  terminates media playback of first played back media  121  and just before second electronic device  20  initiates media playback of second played back media  221  in accordance with the media playback transition. This may enable system  1  to determine the ambient conditions in system  1  that exist during the media playback transition but that are not generated by a media playback component of system  1 . Media transition module  306  may generate shared initial playback control data  315  at least partially based on sensed ambient characteristic value data  317  such that a playback characteristic value of second played back media  221  initially played back by second electronic subsystem  20  after the media playback transition may take into account any ambient conditions in system  1 . 
     In some embodiments, media transition module  306  may generate shared initial playback control data  315  based on sensed ambient characteristic value data  317  during the transition as well as based on playback characteristic value data of first played back media  121  played back by first electronic subsystem  10  before the transition (e.g., based on first sensed playback characteristic value data  311  and/or first internal playback characteristic value data  313 ). For example, media transition module  306  may generate shared initial playback control data  315  to be the aggregate of sensed ambient characteristic value data  317  and first sensed playback characteristic value data  311  or the aggregate of sensed ambient characteristic value data  317  and first internal playback characteristic value data  313 . This may enable the initial playback characteristic value of second played back media  221  outputted by second electronic subsystem  20  after the transition to be equal to the sum of the playback characteristic value of first played back media  121  played back by first electronic subsystem  10  as determined by first electronic device  100  just before the transition and the characteristic value of ambient condition A as determined by first electronic device  100  during the transition. 
     Alternatively or additionally, media transition module  306  may generate shared initial playback control data  315  at least partially based on one or more stored settings. For example, as shown, media transition module  306  may receive stored playback control data  319  from stored control data source  308 , which may be any source of stored control data accessible to media transition module  306 . In some embodiments, stored control data source  308  may be memory  104  of first electronic device  100  and stored playback control data  319  may be any suitable playback control data stored thereon. Alternatively, stored control data source  308  may be provided to media transition module  306  by server  70  or second electronic subsystem  20  via communications set-up  55  and first communications component  106 . 
     Stored playback control data  319  may be any suitable control data that may be defined independent of any current sensed playback characteristic value of system  1 , but may be defined based on predetermined or predefined settings of system  1 . In some embodiments, stored playback control data  319  may be a value (e.g., a value of a playback characteristic) that has been previously defined by a user of system  1  and that may be used by media transition module  306  for generating shared initial playback control data  315 . For example, user U of first electronic device  100  may define stored playback control data  319  with a specific value (e.g., a zero or “mute” value) that be used by media transition module  306  for generating shared initial playback control data  315  that may dictate a specific playback characteristic value for second played back media  221  that may be initially outputted by second electronic subsystem  20  (e.g., a specific playback characteristic value that may initially zero or mute the media played back by second electronic device  200 ). That is, stored playback control data  319  may be used by media transition module  306  for generating shared initial playback control data  315  that may cause second played back media  221  initially outputted by second electronic subsystem  20  to be mute (e.g., to have a zero value for its loudness playback characteristic). 
     Additionally or alternatively, stored playback control data  319  may be a value that is determined based on specific calendar data or other application data (e.g., text message or e-mail data from a messaging application) accessible by system  1 . For example, if a calendar application of first electronic device  100  indicates that user U is at a party at a specific location during the transition initiation event, then a value for stored playback control data  319  that may be specific to a party at that location may be used by media transition module  306  for generating shared initial playback control data  315  appropriate for a party at that specific location. As another example, if a calendar application of first electronic device  100  indicates that it is a specific time of day during the transition initiation event, then a value for stored playback control data  319  that may be specific to that time of day may be used by media transition module  306  for generating shared initial playback control data  315  appropriate for that time of day. Therefore, stored playback control data  319  may be indicative of any suitable data that may at least partially dictate the value of shared initial playback control data  315  based on any suitable condition and/or any suitable application being run by system  1 . 
     Alternatively or additionally, media transition module  306  may generate shared initial playback control data  315  at least partially based on the value of any appropriate relationship between first electronic subsystem  10  and second electronic subsystem  20  within system  1 . For example, as shown, media transition module  306  may receive relationship playback control data  321  from a relationship data source  310 , which may be any source of control data accessible to media transition module  306 . In some embodiments, relationship data source  310  may be memory  104  of first electronic device  100  and relationship playback control data  321  may be any suitable playback control data stored thereon. Alternatively or additionally, relationship data source  310  may be provided to media transition module  306  by server  70  or second electronic subsystem  20  via communications set-up  55  and first communications component  106 . 
     Relationship playback control data  321  may be any suitable control data that may be defined based on the value of any appropriate relationship characteristic between first electronic subsystem  10  and second electronic subsystem  20 . For example, relationship playback control data  321  may be control data determined by the value of a distance between first electronic subsystem  10  and second electronic subsystem  20  during the transition (e.g., the length of distance D between location L 1  of user U and first electronic subsystem  10  and location L 2  of table T and second electronic subsystem  20  of  FIG. 3 ). Such distance relationship playback control data  321  may be generated by relationship data source  310  using various pieces of information that may be accessed from various sources. For example, server  70  may be able to determine locations L 1  and L 2  based on information shared by each subsystem with server  70  (e.g., global positioning system (“GPS”) data), and server  70  may be able to send this information to relationship data source  310  as first server relationship data  323 . Then relationship data source  310  may be able to leverage this first server relationship data  323  to determine distance D for generating relationship playback control data  321 . Alternatively, second electronic subsystem  20  may be able to determine its own location L 2  (e.g., using a location sensor of second electronic device  200 ), and second electronic subsystem  20  may be able to send this information to relationship data source  310  as second subsystem relationship data  325  (e.g., via communications set-up  55 ). Then relationship data source  310  may be able to leverage this second subsystem relationship data  325  with location L 1  information determined locally by first electronic device  100  to determine distance D for generating relationship playback control data  321 . 
     Relationship playback control data  321  that is indicative of a known distance between subsystems  10  and  20  of system  1  may be taken into account by media transition module  306  when determining shared initial playback control data  315 . This may enable a consistent user experience for user U during the media playback transition. For example, shared initial playback control data  315  that dictates the initial volume playback characteristic value of second played back audio media  221  initially outputted by second electronic subsystem  20  may be at least partially based on such relationship playback control data  321  so that the initial volume playback characteristic value of second played back audio media  221  may be proportional to the distance D between subsystems  10  and  20 . This may enable the volume of second played back audio media  221  initially outputted by second subsystem  20  after the transition to be loud enough to traverse a long distance D (or quiet enough to traverse a short distance D) from second subsystem location L 2  to user U at first subsystem location L 1 , such that the volume of that second played back audio media  221  when it reaches L 1  (e.g., sensor  114 ) may be similar to the volume of first played back audio media  121  outputted by first electronic subsystem  10  before the transition (e.g., as determined by first sensed playback characteristic value data  311  and/or first internal playback characteristic value data  313 ). 
     Relationship playback control data  321  may be any suitable control data that may be defined based on the value of any relationship characteristic between first electronic subsystem  10  and second electronic subsystem  20  other than distance. For example, relationship playback control data  321  may be control data determined by the value of an orientation between first electronic subsystem  10  and second electronic subsystem  20  during the transition. An orientation between first electronic subsystem  10  and second electronic subsystem  20  may be an angle or any other suitable orientation value that may be determined using one or more sensors of system  1 , such as a compass or gyroscope sensor of first electronic subsystem  10  and/or a compass or gyroscope of second electronic subsystem  20 . Such an orientation value may be distinct from and independent of any distance value between first electronic subsystem  10  and second electronic subsystem  20 . For example, in a first embodiment of system  1 , as shown in  FIG. 3A , there may be a distance D′ between location L 1  of user U and first electronic subsystem  10  and location L 2  of table T and second electronic subsystem  20 , while a directionality  114 ′ of sensor  114  may be facing directly towards a directionality  212 ′ of media playback component  212  (e.g., along the X-axis of  FIG. 3A ). Comparatively, in a second embodiment of system  1 , as shown in  FIG. 3B , there may be a distance D″ between location L 1  of user U and first electronic subsystem  10  and location L 2  of table T and second electronic subsystem  20 , while a directionality  114 ″ of sensor  114  may be facing directly away from a directionality  212 ″ of media playback component  212  (e.g., along the X-axis of  FIG. 3B ). While the distance D′ may be equal to the distance D″ (e.g., 20 feet), the orientation between directionality  114 ′ and directionality  212 ′ may be a polar opposite of the orientation between directionality  114 ″ and directionality  212 ″ (e.g., 0° versus 180°). Directionality may refer to the polar pattern or sensitivity or orientation or any other suitable characteristic of a sensor or media playback component. 
     Such orientation relationship playback control data  321  may be generated by relationship data source  310  using various pieces of information that may be accessed from various sources. For example, server  70  may be able to determine directionalities of a sensor and a media playback component based on information shared by each subsystem with server  70  (e.g., global positioning system (“GPS”) data), and server  70  may be able to send this information to relationship data source  310  as first server relationship data  323 . Then relationship data source  310  may be able to leverage this first server relationship data  323  to determine an orientation between first electronic subsystem  10  and second electronic subsystem  20  for generating relationship playback control data  321 . Alternatively, second electronic subsystem  20  may be able to determine its own directionality (e.g., using an orientation sensor of second electronic device  200 , such as a compass), and second electronic subsystem  20  may be able to send this information to relationship data source  310  as second subsystem relationship data  325  (e.g., via communications set-up  55 ). Then relationship data source  310  may be able to leverage this second subsystem relationship data  325  with its own directionality information determined locally by first electronic device  100  to determine orientation information between first electronic subsystem  10  and second electronic subsystem  20  for generating relationship playback control data  321 . 
     Relationship playback control data  321  may be defined based on any other suitable relationship between first electronic subsystem  10  and second electronic subsystem  20  besides separation distance or orientation. For example, relationship playback control data  321  may be indicative of a relationship between a specific type of sensor of first electronic subsystem  10  (e.g., sensor  114 ) and a specific type of media playback component of second electronic subsystem  20  (e.g., media playback component  212 ). This may enable any known responses (e.g., frequency responses) by a particular sensor to media played back by a particular playback component to be taken into account by media transition module  306  when determining shared initial playback control data  315 . 
     Therefore, media transition module  306  may generate shared initial playback control data  315  at least partially based on one or more of first sensed playback characteristic value data  311 , first internal playback characteristic value data  313 , sensed ambient characteristic value data  317 , stored playback control data  319 , relationship playback control data  321 , and any combination thereof. This shared initial playback control data  315  may then be transmitted by media transition module  306  to second electronic subsystem  20  for at least partially dictating at least one playback characteristic value of second played back media  221  initially outputted by second electronic subsystem  20  after the transition. In other embodiments, media transition module  306  may not transmit any shared initial playback control data  315  to second electronic subsystem  20 . Instead, various other sources of control data that may be generated internally by second electronic subsystem  20  and/or by server  70  may be used by system  1  to dictate a playback characteristic value of second played back media  221  initially outputted by second electronic subsystem  20  after the media playback transition. For example, as described below, inputted playback control data  407  from input component  210  of second electronic device  200  (e.g., a user&#39;s setting of a volume control knob  210  of second electronic device  200 ) and/or internal data sources of second electronic device  200  (e.g., predetermined control data stored in memory  204 ) may alone dictate a playback characteristic value of second played back media  221  initially outputted by second electronic subsystem  20  after the media playback transition. 
       FIG. 2  also shows a schematic view of a second device control system  401  of second electronic device  200  that may be provided to at least partially control the playback of media by second electronic device  200 . For example, in some embodiments, second device control system  401  may at least partially dictate the value of one or more media playback characteristics of media being played back by media playback component  212  of second electronic device  200  (e.g., based on shared initial playback control data  315  that may be received by first electronic subsystem  10 ). This may enable a consistent user experience for a user proximate to first electronic subsystem  10  within system  1  when the playback of media is transitioned from first electronic subsystem  10  to second electronic subsystem  20 . 
     As shown in  FIG. 2 , for example, second device control system  401  of second electronic device  200  may include a media playback module  402  that may be configured to receive media for playback from one or more media sources. Media playback module  402  may also be configured to receive playback control data from one or more control sources. Moreover, media playback module  402  may also be configured to process such received media and such received control data in order to provide controlled media information to media playback component  212  for output to a user of system  1 . 
     Media playback module  402  may receive media for playback from various media sources accessible to second electronic device  200 . For example, as shown, media playback module  402  may receive stored media  403  for playback from stored media source  404 , which may be a source of media local to second electronic device  200  (e.g., media source  404  may be memory  204  of second electronic device  200  and stored media  403  may be any suitable media stored thereon). As another example, media playback module  402  may receive second streamed media  405  for playback from any suitable streaming media source accessible by first communications component  206  from communications set-up  55  (e.g., server  70  may be a streaming media source that may provide second streamed media  405  to media playback module  402  of second electronic device  200 ). In some embodiments, second streamed media  405  may be the same as first streamed media  305 , and both first streamed media  305  and second streamed media  405  may be provided by the same streaming media source (e.g., server  70 ). As yet another example, media playback module  402  may receive a stream of stored media  303  for playback from stored media source  304  of first electronic device  100  (e.g., via communications set-up  55 ). The media received by media playback module  402  may be any suitable media for playback by second electronic device  200 , such as video media, audio media, graphical media, and the like. 
     Media playback module  402  may receive playback control data from various control sources accessible to second electronic device  200 . For example, as shown, media playback module  402  may receive inputted playback control data  407  from input component  210  of second electronic device  200  (e.g., inputted playback control data  407  may be determined by a user&#39;s interaction with a user interface of second electronic device  200 , such as a user&#39;s pressing of a “volume up” button  210  of second electronic device  200 ). As another example, media playback module  402  may receive inputted playback control data from internal data sources of second electronic device  200  (e.g., predetermined control data stored in memory  204 ). Therefore, such playback control data may be based on the one or more applications being run by second electronic device  200  (e.g., application  203 ) and/or based on any input instructions being received by second electronic device  200  (e.g., via input component  210 ). Moreover, as described above, first electronic subsystem  10  may generate and transmit shared initial playback control data  315  to media playback module  402  of second electronic subsystem  20  for at least partially dictating an initial playback characteristic value of media played back by second electronic subsystem  20  in response to a media playback transition. For example, as shown in  FIG. 2 , media playback module  402  may receive shared initial playback control data  315  from first electronic subsystem  10  via communications set-up  55  and first communications component  206 . The playback control data received by media playback module  402  may be any suitable instructions that can be utilized for controlling the value of any suitable media playback characteristic of media played back by second electronic subsystem  20 , such as the volume level of played back audio media, the brightness or white point of played back video media, and/or the spectral content of the played back media. 
     Media playback module  402  may process the received media and the received playback control data to generate and transmit controlled media information to media playback component  212  for output to a user of system  1  (e.g., user U). For example, as shown, controlled media information  409  may be generated by media playback module  402  and transmitted to media playback component  212  based on the media and playback control data received by media playback module  402 . This controlled media information  409  may be received by media playback component  212  and may be outputted by media playback component  212  as initial second played back media  221 , which may be experienced by a user of system  1  (e.g., user U may hear second played back audio media  221  via a loud speaker media playback component  212  and/or user U may see second played back video media  221  via a display media play back component  212 ). Media playback module  402  may continuously update controlled media information  409  with different playback control data as new playback control data is received by media playback module  402 , such that the value of one or more playback characteristics of second played back media  221  may be continuously changed during playback of media by second electronic subsystem  20  to a user of system  1 . 
     As mentioned, during a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 , shared initial playback control data  315  may be used to at least partially dictate an initial playback characteristic value of second played back media  221  outputted by second electronic subsystem  20 . For example, in some embodiments, during such a media playback transition, controlled media information  409  may be generated by media playback module  402  based on shared initial playback control data  315  alone (e.g., not also based on control data  407 ). In other embodiments, during such a media playback transition, controlled media information  409  may be generated by media playback module  402  based on shared initial playback control data  315  in combination with one or more other types of received control data (e.g., control data  407 ). When shared initial playback control data  315  is received by media playback module  402 , controlled media information  409  generated by media playback module  402  may cause media playback component  212  to output initial second played back media  221  as initially played back media with a playback media characteristic at least partially dictated by shared initial playback control data  315 . 
     As shown in  FIG. 2 , for example, second device control system  401  of second electronic device  200  may also include an information collection module  406  that may be configured to determine one or more types of information about second electronic subsystem  20  that may be utilized by system  1  during a media playback transition. For example, information collection module  406  may be configured to determine at least one playback characteristic value of media played back by second electronic subsystem  20 . Moreover, information collection module  406  may be configured to collect certain relationship playback control data  421  that may be at least partially indicative of a relationship between first electronic subsystem  10  and second electronic subsystem  20 . Based on some or all of the received data, information collection module  406  may generate and transmit second subsystem relationship data  325  to first electronic subsystem  10  (e.g., to relationship data source  310  of first electronic device  100  via communications set-up  55  and first communication components  106  and  206 ). 
     Information collection module  406  may determine at least one playback characteristic value of second played back media  221  initially played back by second electronic subsystem  20  during a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . For example, as shown, information collection module  406  may be configured to receive second sensed playback characteristic value data  427  from sensor  214  of second electronic device  200 . Second sensed playback characteristic value data  427  may be generated by sensor  214  based on the sensed value of a playback characteristic of second played back media  221  initially outputted by media playback component  212  during a media playback transition in response to shared initial playback control data  315 . For example, sensor  214  may be a microphone configured to sense the volume of second played back audio media  221  and transmit second sensed playback characteristic value data  427  indicative of that sensed volume to information collection module  406 . As another example, sensor  214  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of second played back video media  221  and transmit second sensed playback characteristic value data  427  indicative of that sensed brightness or white point or any other suitable characteristic to information collection module  406 . 
     Additionally or alternatively, information collection module  406  may be configured to receive second internal playback characteristic value data  413  from within second device control system  401 . For example, second internal playback characteristic value data  413  may be internally generated by media playback module  402  based on a playback characteristic value of controlled media information  409  initially generated during a media playback transition in response to shared initial playback control data  315 . For example, media playback module  402  may be configured to determine what a sensed playback characteristic value of controlled media information  409  would be when outputted by media playback component  212  as second played back media  221  without requiring that value to be physically sensed by sensor  214  (e.g., media playback module  402  may leverage known controlled media information  409  with known characteristics of media playback component  212  to internally determine a playback characteristic value of second played back media  221  outputted by component  212  and thereby generate second internal playback characteristic value data  413 ). 
     Alternatively or additionally, information collection module  406  may be configured to receive relationship playback control data  421  from a relationship data source  410 , which may be any source of control data accessible to information collection module  406 . In some embodiments, relationship data source  410  may be memory  204  of second electronic device  200  and relationship playback control data  421  may be any suitable playback control data stored thereon. Alternatively or additionally, relationship data source  410  may be provided to information collection module  406  by server  70  or first electronic subsystem  10  via communications set-up  55  and first communications component  206 . 
     Relationship playback control data  421  may be any suitable control data that may be defined based on a relationship between first electronic subsystem  10  and second electronic subsystem  20 . For example, relationship playback control data  421  may be control data determined by the distance between first electronic subsystem  10  and second electronic subsystem  20  during the transition (e.g., distance D between location L 1  of user U and first electronic subsystem  10  and location L 2  of table T and second electronic subsystem  20  of  FIG. 3 ). Such distance relationship playback control data  421  may be generated by relationship data source  410  using various pieces of information that may be accessed from various sources. For example, server  70  may be able to determine locations L 1  and L 2  based on information shared by each subsystem with server  70 , and server  70  may be able to send this information to relationship data source  410  as second server relationship data  423 . Then relationship data source  410  may be able to leverage this second server relationship data  423  to determine distance D for generating relationship playback control data  421 . Alternatively, relationship playback control data  421  may be generated entirely based on data determined locally by second subsystem  20  (e.g., about its own location or other features that may be shared by second subsystem  20 ). 
     Therefore, information collection module  406  may generate second subsystem relationship data  325  at least partially based on one or more of second sensed playback characteristic value data  427 , second internal playback characteristic value data  413 , relationship playback control data  421 , and any combination thereof. This second subsystem relationship data  325  may then be transmitted by information collection module  406  to first electronic subsystem  10  for helping enable a consistent user experience for user U during the media playback transition (e.g., for at least partially dictating the generation of shared initial playback control data  315 ). In other embodiments, information collection module  406  may not transmit any second subsystem relationship data  325  to first electronic subsystem  10 . Instead, various other control data that may be generated internally by first electronic subsystem  10  and/or by server  70  may be used to dictate how first electronic subsystem  10  may enable a consistent user experience for user U during the media playback transition from subsystem  10  to subsystem  20 . 
     Once second played back media  221  is initially outputted by media playback component  212  in response to shared initial playback control data  315  being received by media playback module  402  during a media playback transition, such second played back media  221  may be detected by first electronic subsystem  10  in order to determine whether any additional playback control data is needed to adjust the playback of media from second electronic subsystem  20 . For example, media transition module  306  of first device control system  301  may sense at least one playback characteristic value of second played back media  221  outputted by second electronic subsystem  20  in response to shared initial playback control data  315  being received by media playback module  402  during a media playback transition. As shown in  FIG. 2 , for example, media transition module  306  may be configured to receive second sensed playback characteristic value data  327  from sensor  114  of first electronic device  100 . Second sensed playback characteristic value data  327  may be generated by sensor  114  based on the sensed value of a playback characteristic of second played back media  221  initially outputted by media playback component  212  during a media playback transition in response to shared initial playback control data  315 . For example, sensor  114  may be a microphone configured to sense the volume of second played back audio media  221  and transmit second sensed playback characteristic value data  327  indicative of that sensed volume to media transition module  306 . As another example, sensor  114  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of second played back video media  221  and transmit second sensed playback characteristic value data  327  indicative of that sensed brightness or white point or any other suitable characteristic to media transition module  306 . 
     Media transition module  306  may also be configured to generate shared adjustment playback control data  329  based on second sensed playback characteristic value data  327  in combination with any additional data that may be available to media transition module  306 . Therefore, media transition module  306  may generate shared adjustment playback control data  329  at least partially based on one or more of first sensed playback characteristic value data  311 , first internal playback characteristic value data  313 , sensed ambient characteristic value data  317 , second sensed playback characteristic value data  327 , stored playback control data  319 , relationship playback control data  321 , and any combination thereof, where such relationship playback control data  321  may be at least partially based on second subsystem relationship data  325  from information collection control module  406 , where such second subsystem relationship data  325  may be at least partially based on second sensed playback characteristic value data  427 , second internal playback characteristic value data  413 , and/or relationship playback control data  421 . Such shared adjustment playback control data  329  may then be transmitted by media transition module  306  to second electronic subsystem  20  for adjusting at least one playback characteristic value of media being played back by second electronic subsystem  20  after the transition. 
     For example, in some embodiments, media transition module  306  may be configured to generate and transmit shared adjustment playback control data  329  based on a comparison of first sensed playback characteristic value data  311  with second sensed playback characteristic value data  327 . For example, by comparing first sensed playback characteristic value data  311  with second sensed playback characteristic value data  327 , media transition module  306  may be able to determine the difference between a playback characteristic value of first played back media  121  played back by first electronic subsystem  10  as sensed by first electronic subsystem  10  before the transition and a playback characteristic value of second played back media  221  initially played back by second electronic subsystem  20  as sensed by first electronic subsystem  10  after the transition. This comparison may be indicative of the difference in volume between previously played back audio media  121  sensed by microphone sensor  114  at location L 1  of first electronic subsystem  10  and user U before the transition and initially played back audio media  221  sensed by microphone  114  at location L 1  of first electronic subsystem  10  and user U after the transition. Then, media transition module  306  may be configured to generate and transmit shared adjustment playback control data  329  at least partially based on this detected difference, for example, such that shared adjustment playback control data  329  may be configured to adjust the volume of audio media currently played back by second electronic subsystem  20  to match the volume of audio media  121  previously played back by first electronic subsystem  10 . This may allow for the volume of media played back by second electronic subsystem  20  to be measured and modified iteratively by media transition module  306  until the volume of media played back by second electronic subsystem  20  as measured by first electronic subsystem  10  after the transition is equal to the target volume (e.g., the volume of previously played back audio media  121  sensed by microphone sensor  114  at location L 1  of user U and first electronic subsystem  10  before the transition). 
     In some embodiments, media transition module  306  may also generate shared adjustment playback control data  329  using a more adaptive approach that may be at least partially based on sensed ambient characteristic value data  317 . For example, shared adjustment playback control data  329  may be generated based on the difference between the volume of second played back audio media  221  sensed by microphone  114  at location L 1  of user U and first electronic subsystem  10  after the transition (e.g., second sensed playback characteristic value data  327 ) and the volume sum of the volume of previously played back audio media  121  sensed by microphone sensor  114  at location L 1  of user U and first electronic subsystem  10  before the transition (e.g., first sensed playback characteristic value data  311 ) and the volume of ambient condition A sensed by microphone sensor  114  at location L 1  of user U and first electronic subsystem  10  during the transition (e.g., sensed ambient characteristic value data  317 ). That is, shared adjustment playback control data  329  may be generated based on the equation of second sensed playback characteristic value data  327 −first sensed playback characteristic value data  311 +sensed ambient characteristic value data  317 . This may allow for the volume of media played back by second electronic subsystem  20  to be measured and modified iteratively by media transition module  306  until the volume of media played back by second electronic subsystem  20  as measured by first electronic subsystem  10  after the transition is the sum of the target volume (e.g., the volume of previously played back audio media  121  sensed by microphone sensor  114  at location L 1  of user U and first electronic subsystem  10  before the transition) and the ambient volume (e.g., the volume of ambient condition A sensed by microphone sensor  114  at location L 1  of user U and first electronic subsystem  10  during the transition). 
     Alternatively or additionally, various other types of data available to media transition module  306  may be leveraged to at least partially generate shared adjustment playback control data  329 . For example, any suitable relationship playback control data  321 , including any suitable data provided to first electronic subsystem  10  from second electronic subsystem  20  as second subsystem relationship data  325 , may be utilized by media transition module  306  when determining shared adjustment playback control data  329  for adjusting a playback characteristic value of media played back by second electronic subsystem  20 . For example, shared adjustment playback control data  329  may be generated at least partially based on some combination of the volume of second played back audio media  221  sensed by microphone  114  at location L 1  of user U and first electronic subsystem  10  after the transition (e.g., second sensed playback characteristic value data  327 ) and the volume of second played back audio media  221  sensed by microphone  214  at location L 2  of second electronic subsystem  20  after the transition (e.g., second sensed playback characteristic value data  427 ). 
     Relationship playback control data  321  that is indicative of a known orientation between subsystems  10  and  20  of system  1  (e.g., as described above with respect to  FIGS. 3A and 3B ) may be taken into account by media transition module  306  when determining shared initial playback control data  315  and/or shared adjustment playback control data  329 . This may enable a consistent user experience for user U during the media playback transition. For example, shared adjustment playback control data  329  may be at least partially based on such orientational relationship playback control data  321  so that the volume playback characteristic value of adjusted third played back audio media  223  may take into account how sensor  114  may sense the volume of second played back audio media  221 . For example, this may enable media transition module  306  to take into account whether the directionality of sensor  114  is facing towards or away from the directionality of media playback component  212  when sensor  114  may have sensed the volume playback characteristic value of second played back audio media  221  (e.g., that sensed volume value would necessarily be louder if the directionalities were facing towards one another rather than away from one another). By taking into account the one or more relationships between the sensors and playback components of system  1  (e.g., distances, orientations, responses, etc.) when generating shared initial playback control data  315  and/or shared adjustment playback control data  329  may allow for system  1  to provide a more consistent user experience for user U when the playback of media is transitioned from first electronic subsystem  10  to second electronic subsystem  20 . 
     In some embodiments, system  1  may instruct user U to maintain a particular sensor in a particular fashion (e.g., orientation or distance) with respect to a particular media playback component in order to more precisely transition the playback of media with a consistent user experience. For example, I/O component  111  of first electronic device  100  may instruct user U to maintain sensor  114  at a constant distance from media playback component  212  for a particular duration of time (e.g., during at least a portion of the process of transitioning media playback from first subsystem  10  to second subsystem  20 ), such that the calculation of shared initial playback control data  315  and/or shared adjustment playback control data  329  may not have to take into account the possibility of a varying distance between the two subsystems. As another example, I/O component  111  of first electronic device  100  may instruct user U to orient sensor  114  directly towards media playback component  212  and maintain that orientation for a particular duration of time (e.g., during the process of transitioning media playback from first subsystem  10  to second subsystem  20 ) such that the calculation of shared initial playback control data  315  and/or shared adjustment playback control data  329  may not have to take into account the possibility of varying orientations between the two subsystems. 
     After the initial media playback transition from first electronic subsystem  10  to second electronic subsystem  20 , shared adjustment playback control data  329  may be used to at least partially adjust a current playback characteristic value of media played back by second electronic subsystem  20 . For example, in some embodiments, after the initial media playback transition (e.g., after second played back media  221  is initially outputted by media playback component  212  in response to initial controlled media information  409  that may be at least partially based on shared initial playback control data  315 ), controlled media information  409  may be adjusted or otherwise updated by media playback module  402  at least partially based on shared adjustment playback control data  329 . When shared adjustment playback control data  329  is received by media playback module  402 , adjusted controlled media information  409  generated by media playback module  402  at least partially based on shared adjustment playback control data  329  may cause media playback component  212  to output adjusted third played back media  223  as adjusted played back media with a playback media characteristic at least partially dictated by shared adjustment playback control data  329 . Adjusted third played back media  223  may then be sensed by second electronic subsystem  20  similarly to initial second played back media  221  for defining adjusted third sensed playback characteristic value data  431 , which may then be similarly leveraged by information collection module  406  for updating second subsystem relationship data  325 . Moreover, adjusted third played back media  223  may then be sensed by first electronic subsystem  10  similarly to initial second played back media  221  for defining adjusted third sensed playback characteristic value data  331 , which may then be similarly leveraged by media transition module  306  for updating shared adjustment playback control data  329 . Therefore, first electronic subsystem  10  may sense and iteratively and/or adaptively adjust a playback characteristic value of media played back by second electronic subsystem  20  after a transition. 
     In other embodiments, media transition module  306  may not transmit any shared adjustment playback control data  329  to second electronic subsystem  20 . Instead, various other control data that may be generated internally by second electronic subsystem  20  and/or by server  70  may be used to dictate how second electronic subsystem  20  may adjust one or more playback characteristics of media being played back by second electronic subsystem  20  after the media playback transition. For example, inputted playback control data  407  from input component  210  of second electronic device  200  (e.g., a user&#39;s setting of a volume control knob  210  of second electronic device  200 ) or internal data sources of second electronic device  200  (e.g., predetermined control data stored in memory  204 ) may dictate how second electronic subsystem  20  adjusts one or more playback characteristics of media after the initial media playback transition. 
     Therefore, by generating shared initial playback control data  315  based on how first played back media  121  may be sensed by sensor  114  of first electronic subsystem  10  before a transition and/or based on a relationship between subsystems  10  and  20 , and then by dictating how initial second played back media  221  may be played back by second electronic subsystem  20  initially after a transition based on such shared initial playback control data  315 , system  1  may help provide a consistent user experience during the initial transition. Additionally or alternatively, by generating shared adjustment playback control data  329  based on how initial second played back media  221  may be sensed by sensor  114  of first electronic subsystem  10  after an initial transition and/or based on a relationship between subsystems  10  and  20 , and then by dictating how adjusted third played back media  223  may be played back by second electronic subsystem  20  after the transition based on such shared adjustment playback control data  329 , system  1  may help provide a consistent user experience during the transition. 
     System  1  may be configured in various other ways and may include various other combinations of various devices while still providing a consistent experience for a user of system  1  (e.g., user U proximate to first electronic subsystem  10 ) as the playback of media is switched from first electronic subsystem  10  to second electronic subsystem  20 . For example, in some embodiments, first electronic subsystem  10  may include first electronic device  100  as well as a first accessory device, while second electronic system  20  may include second electronic device  200  as well as a second accessory device. In other embodiments, only one of first electronic subsystem  10  and second electronic subsystem  20  may include an accessory device. Yet in other embodiments, neither first electronic subsystem  10  nor second electronic subsystem  20  may include an accessory device. 
     In some embodiments, as shown in  FIGS. 1-3 , first electronic subsystem  10  may also include a first accessory device  180  and a communications set-up  155  through which first accessory device  180  and first electronic device  100  may communicate with one another within first electronic subsystem  10 , while, alternatively or additionally, second electronic subsystem  20  may include a second accessory device  280  and a communications set-up  255  through which second accessory device  280  and second electronic device  200  may communicate with one another within second electronic subsystem  20 . Either one or both of first accessory device  180  and second accessory device  280  can include, but is not limited to, a music player, video player, still image player, game player, other media player, music recorder, movie or video camera or recorder, still camera, other media recorder, radio, medical equipment, domestic appliance, transportation vehicle instrument, musical instrument, calculator, cellular telephone, other wireless communication device, personal digital assistant, remote control, pager, computer (e.g., a desktop, laptop, tablet, server, etc.), monitor, television, stereo equipment, set up box, set-top box, boom box, modem, router, printer, or any combination thereof. Either one or both of first accessory device  180  and second accessory device  280  may be any portable, mobile, hand-held, or miniature electronic device that may be configured to playback media wherever a user travels. Alternatively, either one or both of first accessory device  180  and second accessory device  280  may not be portable at all, but may instead be generally stationary. 
     First accessory device  180  may be any suitable accessory device that may be used in conjunction with first electronic device  100  to enrich or enhance the capabilities of first electronic subsystem  10 , including the capabilities of first electronic subsystem  10  on its own and independent of the capabilities of first electronic subsystem  10  when used in conjunction with second electronic subsystem  20  of system  1 . For example, first accessory device  180  may include a set of headphones that may receive audio media from an audio line-out or audio signal transmitter of first electronic device  100  via communications set-up  155  and then output that received audio media as sound waves that may be heard by a user of first electronic subsystem  10 . As another example, first accessory device  180  may additionally or alternatively include a display that may receive video media from a video line-out or video signal transmitter of first electronic device  100  via communications set-up  155  and then output that received video media as light waves that may be seen by a user of first electronic subsystem  10 . As yet another example, first accessory device  180  may additionally or alternatively include a media sensor that may detect characteristic value data about certain played back media or ambient conditions in the environment of first electronic subsystem  10  and then transmit that detected characteristic value data to a data line-in or data signal receiver of first electronic device  100  via communications set-up  155 . Similarly, second accessory device  280  may be any suitable accessory device that may be used in conjunction with second electronic device  200  to enrich or enhance the capabilities of second electronic subsystem  20  (e.g., a set of headphones or loudspeakers, a display, and/or a media sensor). 
     As shown in  FIG. 1 , for example, first accessory device  180  of first electronic subsystem  10  may include a processor  182 , memory  184 , power supply  188 , input component  190 , media playback component  192 , sensor  194 , and communications component  196 . In some embodiments, input component  190  and media playback component  192  of first accessory device  180  may sometimes be a single I/O interface or I/O component  191 . First accessory device  180  may also include a housing  181  and a bus  198  that may provide one or more wired or wireless communications links or paths for transferring data and/or power to, from, or between various other components of first accessory device  180 . As also shown in  FIG. 1 , processor  182  may be used to run an application  183  that may include, but is not limited to, one or more operating system applications, firmware applications, media playback applications, media editing applications, or any other suitable applications. Application  183  may be accessed by processor  182  from any suitable source, such as from memory  184  (e.g., via bus  198 ), from first electronic device  100  or from a server of communications set-up  155  (e.g., via communications component  196 ), or from any other suitable source. In some embodiments, one or more components of first accessory device  180  may be combined or omitted. Moreover, first accessory device  180  may include other components not combined or included in  FIG. 1  and/or several instances of the components shown in  FIG. 1 . For the sake of simplicity, only one of each of the components of first accessory device  180  is shown in  FIG. 1 . 
     Each one of housing  181 , processor  182 , application  183 , memory  184 , communications component  196 , power supply  188 , input component  190 , I/O component  191 , media playback component  192 , sensor  194 , and bus  198  of first accessory device  180  may be the same as or substantially similar to a respective one of housing  101 , processor  102 , application  103 , memory  104 , second communications component  116 , power supply  108 , input component  110 , I/O component  111 , media playback component  112 , sensor  114 , and bus  118  of first electronic device  100  and, therefore, may not be independently described in greater detail. While, in some embodiments, first electronic device  100  and first accessory device  180  may be the same or substantially similar devices, in other embodiments, first electronic device  100  may have one or more different and/or additional components that first accessory device  180  does not have, and vice versa. 
     In some embodiments, second communications component  116  of first electronic device  100  and communications component  196  of first accessory device  180  may communicate with one another directly, such as, for example, via a shared communications link  151  of communications set-up  155  that may include one or more wired and/or wireless communications links or paths for transferring any suitable data and/or power between first electronic device  100  and first accessory device  180  within first electronic subsystem  10 . Alternatively or additionally, in some embodiments, communications set-up  155  of first electronic subsystem  10  may include a communications network  150 , with which one or both of first electronic device  100  and first accessory device  180  may communicate (e.g., via respective communications links  161  and  171 ). Communications network  150  may include a server  170 , which may be similar to server  70 . Therefore, in some embodiments, communications set-up  155  may be substantially similar to communications set-up  55 . 
     As also shown in  FIG. 1 , for example, second accessory device  280  of second electronic subsystem  20  may include a processor  282 , memory  284 , power supply  288 , input component  290 , media playback component  292 , sensor  294 , and communications component  296 . In some embodiments, input component  290  and media playback component  292  of second accessory device  280  may sometimes be a single I/O interface or I/O component  291 . Second accessory device  280  may also include a housing  281  and a bus  298  that may provide one or more wired or wireless communications links or paths for transferring data and/or power to, from, or between various other components of second accessory device  280 . As also shown in  FIG. 1 , processor  282  may be used to run an application  283  that may include, but is not limited to, one or more operating system applications, firmware applications, media playback applications, media editing applications, or any other suitable applications. Application  283  may be accessed by processor  282  from any suitable source, such as from memory  284  (e.g., via bus  298 ), from second electronic device  200  or from a server of communications set-up  255  (e.g., via communications component  296 ), or from any other suitable source. In some embodiments, one or more components of second accessory device  280  may be combined or omitted. Moreover, second accessory device  280  may include other components not combined or included in  FIG. 1  and/or several instances of the components shown in  FIG. 1 . For the sake of simplicity, only one of each of the components of second accessory device  280  is shown in  FIG. 1 . 
     Each one of housing  281 , processor  282 , application  283 , memory  284 , communications component  296 , power supply  288 , input component  290 , I/O component  291 , media playback component  292 , sensor  294 , and bus  298  of second accessory device  280  may be the same as or substantially similar to a respective one of housing  201 , processor  202 , application  203 , memory  204 , second communications component  216 , power supply  208 , input component  210 , I/O component  211 , media playback component  212 , sensor  214 , and bus  218  of second electronic device  200  and, therefore, may not be independently described in greater detail. While, in some embodiments, second electronic device  200  and second accessory device  280  may be the same or substantially similar devices, in other embodiments, second electronic device  200  may have one or more different and/or additional components that second accessory device  280  does not have, and vice versa. 
     In some embodiments, second communications component  216  of second electronic device  200  and communications component  296  of second accessory device  280  may communicate with one another directly, such as, for example, via a shared communications link  251  of communications set-up  255  that may include one or more wired and/or wireless communications links or paths for transferring any suitable data and/or power between second electronic device  200  and second accessory device  280  within second electronic subsystem  20 . Alternatively or additionally, in some embodiments, communications set-up  255  of second electronic subsystem  20  may include a communications network  250 , with which one or both of second electronic device  200  and second accessory device  280  may communicate (e.g., via respective communications links  261  and  271 ). Communications network  250  may include a server  270 , which may be similar to server  70 . Therefore, in some embodiments, communications set-up  255  may be substantially similar to communications set-up  55 . 
     Each subsystem of system  1  may be configured in various ways and may include various combinations of various devices while still providing a consistent user experience when transitioning media playback between multiple electronic devices (e.g., while still providing a consistent experience for a user proximate to first electronic subsystem  10  as the playback of media is switched from first electronic subsystem  10  to second electronic subsystem  20 ). For example, in some embodiments, first electronic subsystem  10  may include first electronic device  100  and at least one accessory device (e.g., first accessory device  180 ), and second electronic subsystem  20  may include second electronic device  200  and at least one accessory device (e.g., second accessory device  280 ). 
     In such embodiments, first electronic subsystem  10  may include any suitable first electronic device  100  and any suitable first accessory device  180  that together may be configured to playback media and determine a first value of a playback characteristic of the media played back by first electronic subsystem  10  that may be detected in the environment of first electronic subsystem  10  at a first moment in time before a media playback transition. The combination of first electronic device  100  and first accessory device  180  may also be configured to share certain initial information with second electronic subsystem  20  for dictating an initial value of the playback characteristic for media initially played back by second electronic subsystem  20  at a second moment in time initially after the media playback transition. Moreover, the combination of first electronic device  100  and first accessory device  180  may also be configured to determine a second value of the playback characteristic of the media initially played back by second electronic subsystem  20  that may be detected in the environment of first electronic subsystem  10  at a third moment in time after the media playback transition, and then share certain adjustment information with second electronic subsystem  20  (e.g., based on the determined first and second values) for dictating an adjusted value of the playback characteristic for media played back by second electronic subsystem  20  at a fourth moment in time after the media playback transition. While, in such embodiments, the combination of second electronic device  200  and second accessory device  280  may be configured to initially playback media with a certain initial playback characteristic value based on the shared initial information and then adjust the playback characteristic value of the media played back by second electronic subsystem  20  based on the shared adjustment information. For example, in such embodiments, as shown in  FIGS. 2 and 3 , first electronic subsystem  10  may include at least one media playback component (e.g., media playback component  112  of first electronic device  100  and/or media playback component  192  of first accessory device  180 ), at least one media sensor (e.g., media sensor  114  of first electronic device  100  and/or media sensor  194  of first accessory device  180 ), and first communications component  106  that can share information via communications set-up  55  with first communications component  206  of second electronic subsystem  20 , which may also include a media playback component (e.g., media playback component  212  of second electronic device  200  and/or media playback component  292  of second accessory device  280 ). 
     In some embodiments, rather than or in addition to utilizing media playback component  112  of first electronic device  100  to playback media before a transition, first electronic subsystem  10  may utilize media playback component  192  of first accessory device  180  to playback media before a transition. For example, in some embodiments, as shown in  FIG. 2 , first device control system  301  may at least partially dictate the value of one or more media playback characteristics of media being played back by media playback component  192  of first accessory device  180  before a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . This may enable first electronic subsystem  10  to function when first electronic device  100  does not include its own media playback component (e.g., if first electronic device  100  does not include media playback component  112  capable of outputting media to user U on its own). For example, as shown in  FIG. 3 , first accessory device  180  may include at least one headphone media playback component  192  that may output media to user U, which may be desired if media playback component  112  of first electronic device  100  is not capable of outputting certain media to user U (e.g., if the media to be outputted by first electronic subsystem  10  is audio media but media playback component  112  of first electronic device  100  is only configured to output video media without accompanying audio). 
     With continued reference to  FIG. 2 , media playback module  302  of first device control system  301  may be configured to receive media for playback from one or more media sources, to receive playback control data from one or more control sources, and to process such received media and such received control data in order to provide controlled media information to media playback component  192  of first accessory device  180  for output to a user of system  1 . As mentioned above, media playback module  302  may receive media for playback from various media sources, such as stored media  303  and/or first streamed media  305 . Moreover, as mentioned above, media playback module  302  may receive playback control data from various control sources, such as inputted playback control data  307  and/or stored control data  319 . Media playback module  302  may process the received media and the received playback control data to generate and transmit controlled media information to media playback component  192  for output to a user of first accessory device  180 . For example, as shown, regardless of the source or type of media received by media playback module  302 , and regardless of the source or type of playback control data received by media playback module  302 , controlled media information  349  may be generated by media playback module  302  and transmitted to first accessory device  180  (e.g., via second communications component  116 , communications set-up  155  and communications component  196 ). 
     As also shown in  FIG. 2 , first accessory device  180  may include a first accessory control system  381  that may optionally be used to at least partially dictate the value of one or more media playback characteristics of media being played back by media playback component  192  of first accessory device  180  before a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . For example, first accessory control system  381  of first accessory device  180  may include a media playback module  382  that may be configured to receive controlled media information  349  from media playback module  302  of first electronic device  100 . Moreover, media playback module  382  may be configured to receive playback control data from various control sources, such as inputted playback control data  347  from input component  190  of first accessory device  180  (e.g., inputted playback control data  347  may be determined by a user&#39;s interaction with a user interface of first accessory device  180 , such as a user&#39;s pressing of a “volume up” button  190  of first accessory device  180 ). The received playback control data may be any suitable instructions for controlling the value of any suitable media playback characteristic, such as the volume level of played back audio media, the brightness or white point of played back video media, and/or the spectral content of the played back media. Media playback module  382  may process the received media and the received playback control data of controlled media information  349  along with any other received playback control data (e.g., inputted playback control data  347 ) to generate and transmit accessory controlled media information  359  to media playback component  192  for output to a user of first accessory device  180 . 
     For example, as shown in  FIG. 2 , media playback module  382  of first accessory control system  381  may generate and transmit accessory controlled media information  359  to media playback component  192 , and media playback component  192  may in turn output first played back accessory media  131 , which may be experienced by a user of first accessory device  180  (e.g., a user may hear first played back accessory audio media  131  via a headphone media playback component  192  and/or a user may see first played back accessory video media  131  via a display media play back component  192 ). Media playback module  302  of first electronic device  100  may continuously update controlled media information  349  with different playback control data as new playback control data is received by media playback module  302 , and/or media playback module  382  of first accessory device  180  may continuously update accessory controlled media information  359  with different playback control data as new playback control data is received by media playback module  382 , such that the value of one or more playback characteristics of first played back accessory media  131  may be continuously changed during playback of media to a user using first accessory device  180  of first electronic subsystem  10 . 
     As described above, at some point, system  1  may be configured to transition the playback of media from first electronic subsystem  10  to second electronic subsystem  20 . So that the value of at least one playback characteristic of the media played back by first electronic subsystem  10  before the transition may be maintained for the media played back by second electronic subsystem  20  after the transition, first device control system  301  of first electronic device  100  may also be configured to determine the value of a media playback characteristic of first played back accessory media  131  before the transition, and then at least partially dictate the value of that media playback characteristic for media being played back by second electronic subsystem  20  after the transition (e.g., second played back media  221  being played back by media playback component  212  of second electronic device  200 ). This may provide for a consistent user experience for a user proximate to first electronic subsystem  10  within system  1  (e.g., user U that may be wearing first accessory device  180  within a space that may also include second electronic device  200  on table T, as shown in  FIG. 3 ). 
     As mentioned, media transition module  306  of first device control system  301  may be configured to determine a first playback characteristic value of media played back by first electronic subsystem  10  before a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . Media transition module  306  may also be configured to dictate an initial playback characteristic value of media played back by second electronic subsystem  20  after the media playback transition. Moreover, media transition module  306  may also be configured to determine a second playback characteristic value of media played back by second electronic subsystem  20  after the media playback transition and then dictate an adjustment to the playback characteristic value of the media played back by second electronic subsystem  20  based on the determined first and second playback characteristic values. 
     Media transition module  306  may determine a first playback characteristic value of media played back by first electronic subsystem  10  before a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . For example, as shown, media transition module  306  may be configured to receive first accessory sensed playback characteristic value data  357  from sensor  194  of first accessory device  180  (e.g., via communications component  196 , communications set-up  155 , and second communications component  116 ). First accessory sensed playback characteristic value data  357  may be generated by sensor  194  based on the sensed value of a playback characteristic of first played back media  121  before a media playback transition. For example, sensor  194  may be a microphone configured to sense the volume of first played back audio media  121  and transmit first accessory sensed playback characteristic value data  357  indicative of that sensed volume to media transition module  306 . As another example, sensor  194  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of first played back video media  121  and transmit first accessory sensed playback characteristic value data  357  indicative of that sensed brightness or white point or any other suitable characteristic to media transition module  306 . This may be useful when first media played back by first electronic subsystem  10  before a media playback transition is outputted as first played back media  121  by media playback component  112  of first electronic device  100 , but first electronic device  100  does not include a suitable sensor  114 , such that first electronic subsystem  10  may rely on sensor  194  of first accessory device  180 . 
     Even when media is played back by first accessory device  180 , media transition module  306  may determine a first playback characteristic value of media played back by first electronic subsystem  10  before a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . For example, as shown, media transition module  306  may be configured to receive first sensed accessory playback characteristic value data  341  from sensor  114  of first electronic device  100 . First sensed accessory playback characteristic value data  341  may be generated by sensor  114  based on the sensed value of a playback characteristic of first played back accessory media  131  at first electronic device  100  before a media playback transition. For example, sensor  114  may be a microphone configured to sense the volume of first played back accessory audio media  131  and transmit first sensed accessory playback characteristic value data  341  indicative of that sensed volume to media transition module  306 . As another example, sensor  114  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of first played back accessory video media  131  and transmit first sensed accessory playback characteristic value data  341  indicative of that sensed brightness or white point or any other suitable characteristic to media transition module  306 . 
     Additionally or alternatively, as shown, media transition module  306  may be configured to receive first sensed accessory playback characteristic value data  351  from sensor  194  of first accessory device  180 . First sensed accessory playback characteristic value data  351  may be generated by sensor  194  based on the sensed value of a playback characteristic of first played back accessory media  131  at first accessory device  180  before a media playback transition. For example, sensor  194  may be a microphone configured to sense the volume of first played back accessory audio media  131  and transmit first sensed accessory playback characteristic value data  351  indicative of that sensed volume to media transition module  306  (e.g., via communications component  196 , communications set-up  155 , and second communications component  116 ). As another example, sensor  194  may be a light sensor configured to sense the brightness or white point of first played back accessory video media  131  and transmit first sensed accessory playback characteristic value data  351  indicative of that sensed brightness or white point to media transition module  306  (e.g., via communications component  196 , communications set-up  155 , and second communications component  116 ). 
     Additionally or alternatively, media transition module  306  may be configured to receive first internal accessory playback characteristic value data  353  from within first accessory control system  381 . For example, first internal accessory playback characteristic value data  353  may be internally generated by media playback module  382  of first accessory control system  381  based on a playback characteristic value of accessory controlled media information  359  before a media playback transition. Media playback module  382  may be configured to determine what a sensed playback characteristic value of accessory controlled media information  359  would be when outputted by media playback component  192  without requiring that value to be physically sensed by sensor  114  and/or by sensor  194  (e.g., media playback module  382  may leverage known accessory controlled media information  359  with known characteristics of media playback component  192  to internally determine a playback characteristic value of first played back accessory media  131  outputted by media playback component  192  of first accessory device  180 , and thereby generate first internal accessory playback characteristic value data  353 ). First accessory control system  381  of first accessory device  180  may be configured to transmit first internal accessory playback characteristic value data  353  to media transition module  306  of first electronic device  100  (e.g., via communications component  196 , communications set-up  155 , and second communications component  116 ). 
     Media transition module  306  may be configured to determine at least a first playback characteristic value of first played back accessory media  131  played back by first electronic subsystem  10  at any suitable time (e.g., using first sensed accessory playback characteristic value data  341  received from device sensor  114  and/or using first sensed accessory playback characteristic value data  351  received from accessory sensor  194  and/or using first internal accessory playback characteristic value data  353  received from media playback module  382 ). Therefore, in response to first electronic subsystem  10  detecting a media playback transition initiation event from any suitable component of system  1 , media transition module  306  may be configured to determine the most recent playback characteristic value of first played back media  121  and/or of first played back accessory media  131  as played back by first electronic subsystem  10  (e.g., based on the most recently received playback characteristic value data  311 ,  313 ,  341 ,  351 ,  353 , and/or  357 ). Such playback characteristic value data may be configured to be generated and transmitted to media transition module  306  on a frequent basis so that the playback characteristic value data most recently received by media transition module  306  may be indicative of at least the first playback characteristic value of the current or most recently played back media  121 / 131  of first electronic subsystem  10 . 
     Media transition module  306  may then be configured to generate and transmit shared initial playback control data  315  to second electronic subsystem  20  (e.g., using communications set-up  55  via first communications component  106 ) to dictate an initial playback characteristic value of media played back by second electronic subsystem  20  after the media playback transition (e.g., in response to first electronic subsystem  10  detecting a media playback transition initiation event from any suitable component of system  1 ). As mentioned, media transition module  306  may generate shared initial playback control data  315  at least partially based on one or more of first sensed playback characteristic value data  311 , first internal playback characteristic value data  313 , sensed ambient characteristic value data  317 , stored playback control data  319 , relationship playback control data  321 , and any combination thereof. Alternatively or additionally, media transition module  306  may generate shared initial playback control data  315  at least partially based on a first playback characteristic value of first played back accessory media  131  played back by first electronic subsystem  10  (e.g., based on first sensed accessory playback characteristic value data  341  received from device sensor  114  and/or based on first sensed accessory playback characteristic value data  351  received from accessory sensor  194  and/or based on first internal accessory playback characteristic value data  353  received from media playback module  382 ). That is, shared initial playback control data  315  may be determined at least in part by the most recent playback characteristic value of first played back accessory media  131  played back by first accessory device  180  of first electronic subsystem  10  before the media playback transition, such that a playback characteristic value of second played back media that may be initially played back by second electronic subsystem  20  after the media playback transition may be at least partially dictated by (e.g., similar to) the value of that playback characteristic of first played back accessory media  131  played back by first accessory device  180  of first electronic subsystem  10  before the media playback transition. For example, media transition module  306  may be configured to generate shared initial playback control data  315  that may be utilized by second electronic subsystem  20  to output second played back media  221  with a playback characteristic value substantially equal to or otherwise related to a first playback characteristic value of first played back accessory media  131  played back by first accessory device  180  of first electronic subsystem  10  (e.g., based on received first sensed accessory playback characteristic value data  341  and/or received first sensed accessory playback characteristic value data  351  and/or received first internal accessory playback characteristic value data  353 ). This may help enable a consistent user experience for a user of system  1  experiencing a media playback transition from first media played back and/or sensed by first accessory device  180  of first electronic subsystem  10  to second media played back by second electronic subsystem  20 . 
     Alternatively or additionally, media transition module  306  may generate shared initial playback control data  315  at least partially based on one or more characteristics of ambient condition A sensed within system  1  during the media playback transition. As shown in  FIG. 2 , for example, media transition module  306  may be configured to receive sensed ambient characteristic value data  367  from sensor  194  of first accessory device  180 . Sensed ambient characteristic value data  367  may be generated by sensor  194  based on the sensed value of a characteristic of ambient condition A during a media playback transition. For example, sensor  194  may be a microphone configured to sense the volume of an audio component of ambient condition A (e.g., speech S from user U of  FIG. 3 ) and transmit sensed ambient characteristic value data  367  indicative of that sensed volume to media transition module  306  (e.g., via communications set-up  155 ). As another example, sensor  194  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic or other suitable characteristic of a light component of ambient condition A (e.g., a light source G of  FIG. 3 ) and transmit sensed ambient characteristic value data  367  indicative of that sensed brightness or white point or any other suitable characteristic to media transition module  306  (e.g., via communications set-up  155 ). 
     Media transition module  306  may be configured to determine one or more characteristics of an ambient condition A at any suitable time (e.g., using received sensed ambient characteristic value data  317  and/or sensed ambient characteristic value data  367 ). For example, in response to first electronic subsystem  10  detecting a media playback transition initiation event from any suitable component of system  1 , media transition module  306  may be configured to determine sensed ambient characteristic value data  367  just before second electronic subsystem  20  initiates media playback of second played back media  221  in accordance with the media playback transition. In some embodiments, media transition module  306  may be configured to determine sensed ambient characteristic value data  367  just after first electronic device  100  terminates media playback of first played back media  121  and/or  131  and just before second electronic device  20  initiates media playback of second played back media  221  in accordance with the media playback transition. This may enable system  1  to determine the ambient conditions in system  1  that exist during the media playback transition but that are not generated by a media playback component of system  1 . Media transition module  306  may generate shared initial playback control data  315  at least partially based on sensed ambient characteristic value data  367  such that a playback characteristic value of second played back media  221  initially played back by second electronic subsystem  20  after the media playback transition may take into account any ambient conditions in system  1 . 
     In some embodiments, media transition module  306  may generate shared initial playback control data  315  based on sensed ambient characteristic value data  367  during the transition as well as based on playback characteristic value data of first played back media  121  played back by first electronic subsystem  10  before the transition (e.g., based on playback characteristic value data  311  and/or  313  and/or  353  and/or  357 ). For example, media transition module  306  may generate shared initial playback control data  315  to be the aggregate of sensed ambient characteristic value data  367  and sensed playback characteristic value data  357  or the aggregate of sensed ambient characteristic value data  367  and playback characteristic value data  353 . This may enable the initial playback characteristic value of second played back media  221  outputted by second electronic subsystem  20  after the transition to be equal to the sum of the playback characteristic value of first played back media  121  played back by first electronic subsystem  10  as determined by first accessory device  180  just before the transition and the characteristic value of ambient condition A as determined by first accessory device  180  during the transition. 
     Once second played back media  221  is initially outputted by second electronic subsystem  20  in response to shared initial playback control data  315  being received by media playback module  402  during a media playback transition, such second played back media  221  may be detected by first electronic subsystem  10  in order to determine whether any additional playback control data is needed to adjust the playback of media from second electronic subsystem  20 . For example, media transition module  306  of first device control system  301  may sense at least one playback characteristic value of second played back media  221  outputted by second electronic subsystem  20  in response to shared initial playback control data  315  being received by media playback module  402  during a media playback transition. As mentioned, media transition module  306  may be configured to receive second sensed playback characteristic value data  327  from sensor  114  of first electronic device  100 . Additionally or alternatively, as shown in  FIG. 2 , for example, media transition module  306  may be configured to receive second accessory sensed playback characteristic value data  369  from accessory sensor  194  of first accessory device  180 . Second accessory sensed playback characteristic value data  369  may be generated by sensor  194  based on the sensed value of a playback characteristic of second played back media  221  initially outputted by media playback component  212  during a media playback transition in response to shared initial playback control data  315 . For example, sensor  194  may be a microphone configured to sense the volume of second played back audio media  221  and transmit second accessory sensed playback characteristic value data  369  indicative of that sensed volume to media transition module  306  (e.g., via communications set-up  155 ). As another example, sensor  194  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of second played back video media  221  and transmit second accessory sensed playback characteristic value data  369  indicative of that sensed brightness or white point or any other suitable characteristic to media transition module  306  (e.g., via communications set-up  155 ). 
     Media transition module  306  may also be configured to generate shared adjustment playback control data  329  based on second sensed playback characteristic value data  327  and/or second accessory sensed playback characteristic value data  369  in combination with any additional data that may be available to media transition module  306 . Therefore, media transition module  306  may generate shared adjustment playback control data  329  at least partially based on one or more of first sensed playback characteristic value data  311 , first internal playback characteristic value data  313 , sensed ambient characteristic value data  317 , second sensed playback characteristic value data  327 , stored playback control data  319 , relationship playback control data  321 , first accessory sensed playback characteristic value data  357 , first internal accessory playback characteristic value data  353 , sensed ambient accessory characteristic value data  367 , second accessory sensed playback characteristic value data  369 , and any combination thereof, where such relationship playback control data  321  may be at least partially based on second subsystem relationship data  325  from information collection control module  406 , where such second subsystem relationship data  325  may be at least partially based on second sensed playback characteristic value data  427 , second internal playback characteristic value data  413 , and/or relationship playback control data  421 . Such shared adjustment playback control data  329  may then be transmitted by media transition module  306  to second electronic subsystem  20  for adjusting at least one playback characteristic value of media being played back by second electronic subsystem  20  after the transition. Media transition module  306  may be configured to generate shared adjustment playback control data  329  based on second accessory sensed playback characteristic value data  369  in addition to or as an alternative to generating shared adjustment playback control data  329  based on second sensed playback characteristic value data  327  (e.g., when subsystem  10  only includes sensor  194  for sensing second played back media  221  as second accessory sensed playback characteristic value data  369 ). 
     Information collection module  406  may determine at least one playback characteristic value of second played back media  221  initially played back by second electronic subsystem  20  during a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . For example, as shown, information collection module  406  may be configured to receive second accessory sensed playback characteristic value data  469  from accessory sensor  294  of second accessory device  280  second electronic subsystem  20  (e.g., via communications set-up  255 ). Second accessory sensed playback characteristic value data  469  may be generated by sensor  294  based on the sensed value of a playback characteristic of second played back media  221  initially outputted by media playback component  212  during a media playback transition in response to shared initial playback control data  315 . For example, sensor  294  may be a microphone configured to sense the volume of second played back audio media  221  and transmit second accessory sensed playback characteristic value data  469  indicative of that sensed volume to information collection module  406  (e.g., via communications set-up  255 ). As another example, sensor  294  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of second played back video media  221  and transmit second accessory sensed playback characteristic value data  469  indicative of that sensed brightness or white point or any other suitable characteristic to information collection module  406  (e.g., via communications set-up  255 ). 
     Therefore, information collection module  406  may generate second subsystem relationship data  325  at least partially based on one or more of second sensed playback characteristic value data  427 , second internal playback characteristic value data  413 , relationship playback control data  421 , second accessory sensed playback characteristic value data  469 , and any combination thereof. This second subsystem relationship data  325  may then be transmitted by information collection module  406  to first electronic subsystem  10  for helping enable a consistent user experience for user U during the media playback transition (e.g., for at least partially dictating the generation of shared initial playback control data  315 ). In other embodiments, information collection module  406  may not transmit any second subsystem relationship data  325  to first electronic subsystem  10 . Instead, various other control data that may be generated internally by first electronic subsystem  10  and/or by server  70  may be used to dictate how first electronic subsystem  10  may enable a consistent user experience for user U during the media playback transition from subsystem  10  to subsystem  20 . 
     After the initial media playback transition from first electronic subsystem  10  to second electronic subsystem  20 , shared adjustment playback control data  329  may be used to at least partially adjust a current playback characteristic value of media played back by second electronic subsystem  20 . For example, in some embodiments, after the initial media playback transition (e.g., after second played back media  221  is initially outputted by media playback component  212  in response to initial controlled media information  409  that may be at least partially based on shared initial playback control data  315 ), controlled media information  409  may be adjusted or otherwise updated by media playback module  402  at least partially based on shared adjustment playback control data  329 . When shared adjustment playback control data  329  is received by media playback module  402 , adjusted controlled media information  409  generated by media playback module  402  at least partially based on shared adjustment playback control data  329  may cause media playback component  212  to output adjusted third played back media  223  as adjusted played back media with a playback media characteristic at least partially dictated by shared adjustment playback control data  329 . Adjusted third played back media  223  may then be sensed by accessory sensor  294  of second accessory device  280  of second electronic subsystem  20  similarly to initial second played back media  221  for defining adjusted third accessory sensed playback characteristic value data  471 , which may then be similarly leveraged by information collection module  406  (e.g., via communications set-up  255 ) for updating second subsystem relationship data  325 . Additionally or alternatively, adjusted third played back media  223  may then be sensed by accessory sensor  194  of first accessory device  180  of first electronic subsystem  10  similarly to initial second played back media  221  for defining adjusted third accessory sensed playback characteristic value data  371 , which may then be similarly leveraged by media transition module  306  (e.g., via communications set-up  155 ) for updating shared adjustment playback control data  329 . Therefore, first electronic subsystem  10  may sense and iteratively and/or adaptively adjust a playback characteristic value of media played back by second electronic subsystem  20  after a transition. 
     In some embodiments, rather than or in addition to utilizing media playback component  212  of second electronic device  200  to playback media after a transition, second electronic subsystem  20  may utilize media playback component  292  of second accessory device  280  to playback media after a transition. For example, in some embodiments, as shown in  FIG. 2 , second device control system  401  of second electronic device  200  of second electronic subsystem  20  may at least partially dictate the value of one or more media playback characteristics of media being played back by media playback component  292  of second accessory device  280  after a media playback transition from first electronic subsystem  10  to second electronic subsystem  20  (e.g., based on shared initial playback control data  315  that may be received by first electronic subsystem  10 ). This may enable second electronic subsystem  20  to function when second electronic device  200  does not include its own media playback component (e.g., if second electronic device  200  does not include media playback component  212  capable of outputting media to user U on its own). 
     For example, as shown in  FIG. 3 , second accessory device  280  may include at least one speaker and/or display media playback component  292  that may output media to user U, which may be desired if media playback component  212  of second electronic device  200  is not capable of outputting certain media to user U. For example, in some embodiments, the media to be outputted by second electronic subsystem  20  may be audio media but media playback component  212  of second electronic device  200  may only configured to output video media without accompanying audio. Alternatively, in some embodiments, media playback component  212  may not be configured to output any media capable of being detected by user U. Instead, second electronic device  200  may be an AirPlay™ receiver, such as an AirPort Express™ made available by Apple Inc., that may include an audio output connector media playback component  212  that may not be able to output audible audio waves but that may only be able to communicate audio signals to a loudspeaker accessory device (e.g., second accessory device  280 ) that may be configured to convert those audio signals to audible audio waves that may be output to and heard by a user (e.g., via accessory media playback component  292 ). As another example, second electronic device  200  may be an AirPlay™ receiver, such as Apple TV™ made available by Apple Inc., that may include an audio/video output connector media playback component  212  that may not be able to output audible audio waves and visible video waves but that may only be able to communicate audio/video signals to a television accessory device (e.g., second accessory device  280 ) that may be configured to convert those audio/video signals to audible audio waves and visible video waves that may be output to and experienced by a user (e.g., via accessory media playback component  292 ). This may enable a consistent user experience for user U proximate to first electronic subsystem  10  within system  1  when the output of played back media is transitioned from first electronic subsystem  10  to second accessory device  280  of second electronic subsystem  20  (e.g., in addition to or as an alternative to when the output of played back media is transitioned from first electronic subsystem  10  to second electronic device  200  of second electronic subsystem  20 ). 
     As shown in  FIG. 2 , for example, media playback module  402  of second device control system  401  of second electronic device  200  may be configured to receive media for playback from one or more media sources, to receive playback control data from one or more control sources, and to process such received media and such received control data in order to provide controlled media information to media playback component  292  of second accessory device  280  for output to a user of system  1 . As mentioned, media playback module  402  may receive media for playback from various media sources, such as stored media  403 , second streamed media  405 , and/or stream of stored media  303 . Moreover, media playback module  402  may receive playback control data from various control sources, such as inputted playback control data  407 , inputted playback control data from internal data sources of second electronic device  200  (e.g., predetermined control data stored in memory  204 ), and/or shared initial playback control data  315  for at least partially dictating an initial playback characteristic value of media played back by second electronic subsystem  20  in response to a media playback transition. The playback control data received by media playback module  402  may be any suitable instructions that can be utilized for controlling the value of any suitable media playback characteristic of media played back by second electronic subsystem  20 , such as the volume level of played back audio media, the brightness or white point of played back video media, and/or the spectral content of the played back media. 
     Media playback module  402  may process the received media and the received playback control data to generate and transmit controlled media information to second accessory device  280  for output to a user of system  1  (e.g., user U). For example, as shown, controlled media information  449  may be generated by media playback module  402  based on the media and playback control data received by media playback module  402 , and controlled media information  449  may be then be transmitted to second accessory device  280  (e.g., via second communications component  216 , communications set-up  255  and communications component  296 ). 
     As also shown in  FIG. 2 , second accessory device  280  may include a second accessory control system  481  that may optionally be used to at least partially dictate the value of one or more media playback characteristics of media being played back by media playback component  292  of second accessory device  280  after a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . For example, second accessory control system  481  of second accessory device  280  may include a media playback module  482  that may be configured to receive controlled media information  449  from media playback module  402  of second electronic device  200 . Moreover, media playback module  482  may be configured to receive playback control data from various control sources, such as inputted playback control data  447  from input component  290  of second accessory device  280  (e.g., inputted playback control data  447  may be determined by a user&#39;s interaction with a user interface of second accessory device  280 , such as a user&#39;s pressing of a “volume up” button  290  of second accessory device  280 ). The received playback control data may be any suitable instructions for controlling the value of any suitable media playback characteristic, such as the volume level of played back audio media, the brightness or white point of played back video media, and/or the spectral content of the played back media. Media playback module  482  may process the received media and the received playback control data of controlled media information  449  from second electronic device  200  along with any other received playback control data (e.g., inputted playback control data  447 ) to generate and transmit accessory controlled media information  459  to media playback component  292  for output to a user of second accessory device  280 . 
     For example, as shown in  FIG. 2 , media playback module  482  of second accessory control system  481  may generate and transmit accessory controlled media information  459  to media playback component  292 , and media playback component  292  may in turn output second played back accessory media  231  that may be initially played back by second electronic subsystem  20  after the media playback transition and that may be experienced by a user of first electronic subsystem  10  (e.g., user U may hear second played back accessory audio media  231  via a loud speaker media playback component  292  and/or user U may see second played back accessory video media  231  via a display media play back component  292 ). Media playback module  402  of second electronic device  200  may continuously update controlled media information  449  with different playback control data as new playback control data is received by media playback module  402 , and/or media playback module  482  of second accessory device  280  may continuously update accessory controlled media information  459  with different playback control data as new playback control data is received by media playback module  482 , such that the value of one or more playback characteristics of second played back accessory media  231  may be continuously changed during playback of media to a user of system  1 . 
     During a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 , shared initial playback control data  315  may be used to at least partially dictate an initial playback characteristic value of second played back accessory media  231  outputted by second electronic subsystem  20 . For example, in some embodiments, during such a media playback transition, controlled media information  449  may be generated by media playback module  402  based on shared initial playback control data  315  alone (e.g., not also based on control data  407 ). In other embodiments, during such a media playback transition, controlled media information  449  may be generated by media playback module  402  based on shared initial playback control data  315  in combination with one or more other types of received control data (e.g., control data  407 ). When shared initial playback control data  315  is received by media playback module  402 , controlled media information  449  generated by media playback module  402  may cause media playback component  292  to output initial second played back accessory media  231  as initially played back media with a playback media characteristic at least partially dictated by shared initial playback control data  315 . 
     As mentioned, information collection module  406  of second device control system  401  of second electronic device  200  may be configured to determine one or more types of information about second electronic subsystem  20  that may be utilized by system  1  during a media playback transition. For example, information collection module  406  may be configured to determine at least one playback characteristic value of media played back by second electronic subsystem  20 . Moreover, information collection module  406  may be configured to collect certain relationship playback control data  421  that may be at least partially indicative of a relationship between first electronic subsystem  10  and second electronic subsystem  20 . Based on some or all of the received data, information collection module  406  may generate and transmit second subsystem relationship data  325  to first electronic subsystem  10  (e.g., to relationship data source  310  of first electronic device  100  via communications set-up  55  and first communication components  106  and  206 ). 
     Information collection module  406  may determine at least one playback characteristic value of second played back accessory media  231  initially played back by second accessory device  280  during a media playback transition from first electronic subsystem  10  to second electronic subsystem  20 . For example, as shown, information collection module  406  may be configured to receive second sensed accessory playback characteristic value data  443  from sensor  214  of second electronic device  200 . Second sensed accessory playback characteristic value data  443  may be generated by sensor  214  based on the sensed value of a playback characteristic of second played back accessory media  231  initially outputted by media playback component  292  of second accessory device  280  during a media playback transition in response to shared initial playback control data  315 . For example, sensor  214  may be a microphone configured to sense the volume of second played back accessory audio media  231  and transmit second sensed accessory playback characteristic value data  443  indicative of that sensed volume to information collection module  406 . As another example, sensor  214  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of second played back accessory video media  231  and transmit second sensed accessory playback characteristic value data  443  indicative of that sensed brightness or white point or any other suitable characteristic to information collection module  406 . 
     Additionally or alternatively, information collection module  406  may be configured to receive second sensed accessory playback characteristic value data  455  from sensor  294  of second accessory device  280 . Second sensed accessory playback characteristic value data  455  may be generated by sensor  294  based on the sensed value of a playback characteristic of second played back accessory media  231  initially outputted by media playback component  292  of second accessory device  280  during a media playback transition in response to shared initial playback control data  315 . For example, sensor  294  may be a microphone configured to sense the volume of second played back accessory audio media  231  and transmit second sensed accessory playback characteristic value data  455  indicative of that sensed volume to information collection module  406 . As another example, sensor  294  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of second played back accessory video media  231  and transmit second sensed accessory playback characteristic value data  455  indicative of that sensed brightness or white point or any other suitable characteristic to information collection module  406 . 
     Additionally or alternatively, information collection module  406  may be configured to receive second internal accessory playback characteristic value data  453  from within second accessory control system  481 . For example, second internal accessory playback characteristic value data  453  may be internally generated by media playback module  482  of second accessory control system  481  based on a playback characteristic value of accessory controlled media information  459  initially generated during a media playback transition in response to shared initial playback control data  315 . For example, media playback module  482  may be configured to determine what a sensed playback characteristic value of controlled media information  459  would be when outputted by media playback component  292  as second played back accessory media  231  without requiring that value to be physically sensed by sensor  294  (e.g., media playback module  482  may leverage known controlled media information  459  with known characteristics of media playback component  292  to internally determine a playback characteristic value of second played back accessory media  231  outputted by media playback component  292  and thereby generate second internal accessory playback characteristic value data  453 ). 
     Therefore, information collection module  406  may generate second subsystem relationship data  325  at least partially based on one or more of second sensed playback characteristic value data  427 , second internal playback characteristic value data  413 , relationship playback control data  421 , second sensed accessory playback characteristic value data  443 , second sensed accessory playback characteristic value data  455 , second internal accessory playback characteristic value data  453 , and any combination thereof. This second subsystem relationship data  325  may then be transmitted by information collection module  406  to first electronic subsystem  10  for helping enable a consistent user experience for user U during the media playback transition (e.g., for at least partially dictating the generation of shared initial playback control data  315 ). 
     Once second played back accessory media  231  is initially outputted by media playback component  292  of second accessory device  280  (e.g., rather than or in addition to second played back media  221  being initially outputted by media playback component  212  of second electronic device  200 ) in response to shared initial playback control data  315  being received by media playback module  402  during a media playback transition, such second played back accessory media  231  may be detected by first electronic subsystem  10  in order to determine whether any additional playback control data is needed to adjust the playback of media from second electronic subsystem  20 . For example, media transition module  306  of first device control system  301  may sense at least one playback characteristic value of second played back accessory media  231  outputted by second electronic subsystem  20  in response to shared initial playback control data  315  being received by media playback module  402  during a media playback transition. As shown in  FIG. 2 , for example, media transition module  306  may be configured to receive second sensed accessory playback characteristic value data  343  from sensor  114  of first electronic device  100 . Second sensed accessory playback characteristic value data  343  may be generated by sensor  114  based on the sensed value of a playback characteristic of second played back accessory media  231  initially outputted by media playback component  292  during a media playback transition in response to shared initial playback control data  315 . For example, sensor  114  may be a microphone configured to sense the volume of second played back accessory audio media  231  and transmit second sensed accessory playback characteristic value data  343  indicative of that sensed volume to media transition module  306 . As another example, sensor  114  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of second played back accessory video media  231  and transmit second sensed accessory playback characteristic value data  343  indicative of that sensed brightness or white point or any other suitable characteristic to media transition module  306 . 
     Additionally or alternatively, media transition module  306  may be configured to receive second sensed accessory playback characteristic value data  355  from sensor  194  of first accessory device  180  (e.g., via communications component  196 , communications set-up  155 , and second communications component  116 ). Second sensed accessory playback characteristic value data  355  may be generated by sensor  194  based on the sensed value of a playback characteristic of second played back accessory media  231  initially outputted by media playback component  292  of second accessory device  280  during a media playback transition in response to shared initial playback control data  315 . For example, sensor  194  may be a microphone configured to sense the volume of second played back accessory audio media  231  and transmit second sensed accessory playback characteristic value data  355  indicative of that sensed volume to media transition module  306 . As another example, sensor  194  may be a light sensor configured to sense the brightness or white point or any other suitable characteristic of second played back accessory video media  231  and transmit second sensed accessory playback characteristic value data  355  indicative of that sensed brightness or white point or any other suitable characteristic to media transition module  306 . 
     After the initial media playback transition from first electronic subsystem  10  to second electronic subsystem  20 , shared adjustment playback control data  329  may be used to at least partially adjust a current playback characteristic value of media played back by second electronic subsystem  20 . For example, in some embodiments, after the initial media playback transition (e.g., after second played back media  231  is initially outputted by accessory media playback component  292  in response to initial controlled media information  449  that may be at least partially based on shared initial playback control data  315 ), controlled media information  449  may be adjusted or otherwise updated by media playback module  402  at least partially based on shared adjustment playback control data  329 . When shared adjustment playback control data  329  is received by media playback module  402 , adjusted controlled media information  449  generated by media playback module  402  at least partially based on shared adjustment playback control data  329  may cause accessory media playback component  292  to output adjusted third played back media  233  as adjusted played back media with a playback media characteristic at least partially dictated by shared adjustment playback control data  329 . 
     Adjusted third played back media  233  may then be sensed by sensor  214  of second electronic device  200  of second electronic subsystem  20  for defining adjusted third sensed accessory playback characteristic value data  445 , which may then be leveraged by information collection module  406  for updating second subsystem relationship data  325 . Additionally or alternatively, adjusted third played back media  233  may then be sensed by sensor  294  of second accessory device  280  of second electronic subsystem  20  for defining adjusted third sensed accessory playback characteristic value data  475 , which may then be leveraged by information collection module  406  (e.g., via communications set-up  255 ) for updating second subsystem relationship data  325 . Additionally or alternatively, adjusted third played back media  233  may then be sensed by sensor  114  of first electronic device  100  of first electronic subsystem  10  for defining adjusted third sensed accessory playback characteristic value data  345 , which may then be leveraged by media transition module  306  for updating shared adjustment playback control data  329 . Additionally or alternatively, adjusted third played back media  233  may then be sensed by sensor  194  of first accessory device  180  of first electronic subsystem  10  for defining adjusted third sensed accessory playback characteristic value data  375 , which may then be leveraged by media transition module  306  (e.g., via communications set-up  155 ) for updating shared adjustment playback control data  329 . Therefore, first electronic subsystem  10  may sense and iteratively and/or adaptively adjust a playback characteristic value of media played back by second electronic subsystem  20  after a transition. 
     In other embodiments, first electronic subsystem  10  may only include first electronic device  100  without any first accessory device  180 , yet second electronic system  20  may include not only second electronic device  200  but also second accessory device  280 . In such embodiments, first electronic device  100  may include any suitable device that may be configured to playback media, determine a first value of a characteristic of media played back by first electronic device  100  that may be detected in the environment of first electronic device  100 , determine a second value of the characteristic of media played back by second electronic subsystem  20  that may be detected in the environment of first electronic device  100 , and share certain information with second electronic subsystem  20  based on the determined first and second values, while second electronic device  200  may include any suitable device that may be configured to receive the shared information from first electronic device  100  but that may require second accessory device  280  in order for second electronic subsystem  20  to playback media and/or adjust the value of the characteristic of the media played back by second electronic subsystem  20  based on the shared information. For example, in such embodiments, first electronic device  100  may be an iPhone™ or any other suitable device having a media playback component  112 , a media sensor  114 , and first communications component  106  that can share information via communications set-up  55  with first communications component  206  of second electronic device  200 , while second electronic device  200  may be a “limited smart” media playback device or residential gateway or any other suitable gateway or media receiver (e.g., an AirPort Express™, an AirPort Extreme™, or an Apple TV™ made available by Apple Inc.) having a first communications component  206  for receiving the shared information from first electronic device  100  and a second communications component  216  for communicating with second accessory device  280 , but such a second electronic device  200  may not have or use a media playback component that actually outputs media to a user of system  1 . In such embodiments, second electronic device  200  may be configured to instruct second accessory component  280  (e.g., via communications set-up  255 ) to playback media and adjust the value of the characteristic of the media played back by second accessory component  280  based on the shared information received by second electronic device  200  from first electronic device  100 . Such a second accessory device  280  may be any media playback device, such as a stereo or television, having a media playback component  292  and communications component  296  (e.g., an audio and/or video line-in port). 
     Additionally or alternatively, in some embodiments, first electronic subsystem  10  may not only include first electronic device  100  but also first accessory device  180 , while second electronic system  20  may include second electronic device  200  with or without second accessory device  280 . In such embodiments, first accessory device  180  may include a media playback sensor  194  (e.g., when first electronic device  100  does not include or does not use a media playback sensor  114 ), such that media playback sensor  194  may be configured to determine a first value of a characteristic of media played back by first electronic subsystem  10  that may be detected in the environment of first electronic subsystem  10 , determine a second value of the characteristic of media played back by second electronic subsystem  20  that may be detected in the environment of first electronic subsystem  10 , and share these determined values with first electronic device  100  via communications set-up  155 , while first electronic device  100  may be configured to share certain information based on the determined first and second values with second electronic subsystem  20  via communications set-up  55 . For example, first accessory device  180  may be a microphone or light sensor that may be coupled via a wire to first electronic device  100 , which may be an iPod Nano™ or any other suitable electronic device that does not have a built-in microphone or light sensor. Additionally or alternatively, in such embodiments, first accessory device  180  may include a media playback component  192  (e.g., when first electronic device  100  does not include or use a media playback component  112 ), such that media playback component  192  may be configured to playback media for first electronic subsystem  10 . For example, first accessory device  180  may be headphones or a head mounted display that may be coupled to first electronic device  100 , which may be an iPod Shuffle™ or any other suitable electronic device that does not have or use a built-in loud speaker or display. 
     Therefore, first electronic subsystem  10  of system  1  may include any suitable first electronic device  100  with or without any suitable first accessory device  180 , and second electronic subsystem  20  of system  1  may include any suitable second electronic device  200  with or without any suitable second accessory device  280 . By generating shared initial playback control data  315  based on how first played back media  121  and/or  131  played back by first electronic subsystem  10  may be sensed by a sensor of first electronic subsystem  10  before a transition and/or based on a relationship between subsystems  10  and  20 , and then by dictating how initial second played back media  221  and/or  331  may be played back by second electronic subsystem  20  initially after a transition based on such shared initial playback control data  315 , such a system  1  may help provide a consistent user experience during the initial transition. Additionally or alternatively, by generating shared adjustment playback control data  329  based on how initial second played back media  221  and/or  331  may be sensed by a sensor of first electronic subsystem  10  after an initial transition and/or based on a relationship between subsystems  10  and  20 , and then by dictating how adjusted third played back media  223  and/or  233  may be played back by second electronic subsystem  20  after the transition based on such shared adjustment playback control data  329 , such a system  1  may help provide a consistent user experience during the transition. 
     System  1  may also be configured in various other ways and may include various other combinations of various devices while still providing a consistent experience for a user of system  1  (e.g., user U proximate to first electronic subsystem  10 ) as the playback of media is switched from first electronic subsystem  10  to second electronic subsystem  20 . For example, in some embodiments, as shown in  FIG. 3C , system  1  may include first electronic subsystem  10  and not only original second electronic subsystem  20  but also another second electronic subsystem  20   a . Other second electronic subsystem  20   a  may be any suitable electronic subsystem and may be substantially identical to original second electronic subsystem  20 . However, as shown in  FIG. 3C , original second electronic subsystem  20  and other second electronic subsystem  20   a  may be positioned at different locations from one another. For example, original second electronic subsystem  20  may be positioned at location L 2 , while other second electronic subsystem  20   a  may be positioned at location L 3 , and locations L 2  and L 3  may be separated by a distance D 7 . 
     When first electronic subsystem  10  moves (e.g., along with user U) from a first location to a second location within system  1 , the playback of media may be at least partially transitioned from original second electronic subsystem  20  to other second electronic subsystem  20   a . For example, as shown in  FIG. 3C , first electronic subsystem  10  may be moved from an initial location L 1  along arrow X 1  to an intermediate location L 4  and then along arrow X 2  to a final location L 5  within system  1 . When at initial location L 1 , first electronic subsystem  10  may be a distance D 1  from original second electronic subsystem  20  but also a distance D 4  from other second electronic subsystem  20   a . Moreover, when at intermediate location L 4 , first electronic subsystem  10  may be a distance D 2  from original second electronic subsystem  20  but also a distance D 5  from other second electronic subsystem  20   a . Furthermore, when at final location L 5 , first electronic subsystem  10  may be a distance D 3  from original second electronic subsystem  20  but also a distance D 6  from other second electronic subsystem  20   a . Due to these varying distances between first electronic subsystem  10  and each one of second electronic subsystems  20  and  20   a , system  1  may be configured to provide a consistent experience for a user of system  1  (e.g., user U that may be holding first electronic subsystem  10 ) as the playback of media is switched from first electronic subsystem  10  to original second electronic subsystem  20  and then to other second electronic subsystem  20   a.    
     For example, once the playback of media has been switched from first electronic subsystem  10  at location L 1  to original second electronic subsystem  20  at location L 2  (e.g., as described above with respect to  FIGS. 1-3B ), first electronic subsystem  10  may be moved from initial location L 1  towards final location L 5 . During this movement, the distance between first electronic subsystem  10  and original second electronic subsystem  20  may change (e.g., from distance D 1  to D 2 ). As this distance changes, so may change distance relationship playback control data  321  that may be provided to media transition module  306  (e.g., as described above with respect to distance D of  FIG. 3 ), and, therefore so may change shared adjustment playback control data  329  that may control an adjustment of adjusted third sensed playback characteristic value data  331  for adjusting a playback characteristic value of media played back by second electronic subsystem  20 . In some embodiments, system  1  may have one or more limits that may prevent a playback characteristic value of media played back by second electronic subsystem  20  from going beyond a certain cut-off value. For example, as the distance between first electronic subsystem  10  and second electronic subsystem  20  increases, a volume playback characteristic value of media played back by second electronic subsystem  20  may also be increased in order to maintain a consistent user experience of the played back media. However, system  1  may be configured such that a volume playback characteristic value of media played back by second electronic subsystem  20  may only be increased up to a certain cut-off volume so that a media playback component (e.g., a loud speaker media playback component  212 ) of second electronic subsystem  20  does not burst or break or otherwise damage itself. In such embodiments, in order to maintain the consistent user experience of the played back media, system  1  may be configured to at least partially transition the playback of media from original second electronic subsystem  20  to other second electronic subsystem  20   a.    
     Original second electronic subsystem  20  may be configured to communicate directly with other second electronic subsystem  20   a  via a communications set-up  355 , which may be similar to either communications set-up  55 ,  155 , and/or  255 . Additionally or alternatively, original second electronic subsystem  20  may be configured to communicate with other second electronic subsystem  20   a  via first electronic subsystem  10  (e.g., via communications set-up  55   a  between subsystems  10  and  20 , and via communications set-up  55   b  between subsystems  10  and  20   a ). In any of such embodiments, the distance between subsystem  10  and each one of subsystems  20  and  20   a  may be known by all subsystems of system  1 . As a particular playback characteristic value (e.g., volume) of media played back by second electronic subsystem  20  approaches a certain cut-off value, system  1  may be configured to identify at least one additional second electronic subsystem (e.g., other second electronic subsystem  20   a ) that may be utilized by system  1  to playback media for user U. Additionally or alternatively, as a particular relationship value (e.g., distance) between first electronic subsystem  10  and other second electronic subsystem  20   a  approaches a certain threshold value (e.g., as subsystem  10  is moved to within at least a certain distance of other second electronic subsystem  20   a ), system  1  may be configured to at least partially utilize that other second electronic subsystem  20   a  to playback media for user U. Either reaching a certain cut-off value of a playback characteristic value of original second electronic subsystem  20  and/or reaching a certain threshold value of a relationship value between first electronic subsystem  10  and other second electronic subsystem  20   a  may be collectively referred to herein as a subsystem transition event. In response to detecting a subsystem transition event, system  1  may be configured to achieve the initial playback and/or adjust the further playback of media by other second electronic subsystem  20   a  similarly to the initial playback and/or further playback of media by original second electronic subsystem  20  (e.g., as described above with respect to  FIGS. 1-3B ). 
     Therefore, in response to detecting a subsystem transition event, system  1  may be configured to adjust a playback characteristic value of media played back by original second electronic subsystem  20  in conjunction with adjustments to that playback characteristic value of media played back by other second electronic subsystem  20   a , such that the combined playback characteristic value of the media played back by each one of second electronic subsystems  20  and  20   a  as sensed by first electronic subsystem  10  may be consistent as first electronic subsystem  10  may move (e.g., from initial location L 1 , to intermediate location L 4 , and then to final location L 5 ). This may be useful when user U carries first electronic subsystem  10  from a first room containing original second electronic subsystem  20  to a second room containing other second electronic subsystem  20   a , such that the playback of media may be at least partially transition from being played back by original second electronic subsystem  20  to being played back by other second electronic subsystem  20   a  while maintaining a consistent user experience for user U (e.g., while maintaining a constant volume playback characteristic value of the played back media as experienced by user U at first electronic subsystem  10 ). This may be useful in any situation where a user may want a consistent user experience when the playback of media is transitioned from a first subsystem to a second subsystem due to the user&#39;s movement within a system (e.g., movement from one location to another within a grocery store or an amusement park or anywhere else that may have multiple subsystems configured to playback media to a moving user). In other embodiments, rather than at least partially transitioning media playback between second subsystems  20  and  20   a  due to a subsystem transition event based on a change in a distance relationship between first electronic subsystem  10  and original second electronic subsystem  20 , media playback may be transitioned between second subsystems  20  and  20   a  due to a subsystem transition event based on a change in any other suitable relationship characteristic, such as orientation or frequency response, between first electronic subsystem  10  and original second electronic subsystem  20 . 
     Although system  1  is only shown to include two electronic subsystems in  FIGS. 1-3B , it is to be understood that system  1  may include three or more electronic subsystems as shown in  FIG. 3C , each of which may communicate with one another directly or indirectly. The network architecture of system  1  may be configured in many suitable ways. For example, in some embodiments, when data is transmitted from a particular electronic subsystem, that particular electronic subsystem may broadcast the data to all of the other synched electronic subsystems within system  1  that it may be in communication with (e.g., system  1  may be decentralized). In another embodiment, when data is transmitted from a particular electronic subsystem, that particular electronic subsystem may share the data to a particular “master” electronic subsystem within system  1 , and that master electronic subsystem may then share the received data with any other synched electronic subsystems within system  1 . Such a configuration may reduce the number of communication channels between electronic subsystems and bandwidth in the system but may increase the latency. 
       FIG. 4  is a flowchart of an illustrative process  400  for transitioning the playback of media. Process  400  may begin at step  402  by playing back first media with a first playback value of a first playback characteristic using a first electronic subsystem of a system. For example, as described above with respect to  FIGS. 1-3B , first electronic subsystem  10  of system  1  may be configured to playback first played back media  121  and/or first played back accessory media  131  with a first playback value of a first playback characteristic (e.g., a first volume value or a first brightness value). Next, at step  404 , process  400  may include determining a first relationship value of a first relationship characteristic between the first electronic subsystem and a second electronic subsystem of the system. For example, as described above, system  1  (e.g., media transition module  306 ) may be configured to determine a distance value or an orientation value or a frequency response value between first electronic subsystem  10  and second electronic subsystem  20  of system  1  (e.g., using relationship playback control data  321 ). Then, at step  406 , process  400  may include playing back second media with a second playback value of the first playback characteristic using the second electronic subsystem, where the second playback value is based on the first playback value and the first relationship value. For example, as described above, second electronic subsystem  20  may playback second media with a second playback value of the first playback characteristic based on shared initial playback control data  315 , where shared initial playback control data  315  may be based on relationship playback control data  321  and the first playback value (e.g., first sensed playback characteristic value data  311 , first accessory sensed playback characteristic value data  357 , first internal playback characteristic value data  313 , first internal accessory playback characteristic value data  353 , first sensed accessory playback characteristic value data  341 , and/or first sensed accessory playback characteristic value data  351 ). 
     In some embodiments, the first relationship characteristic determined at step  404  may include one of a distance and an orientation between the first electronic subsystem and the second electronic subsystem. In some embodiments, the first playback characteristic may include one of a volume, a brightness, a white point, and a spectral content. In some embodiments, process  400  may also include sensing a third playback value of the first playback characteristic of the second media using the first electronic subsystem when the second media is being played back by the second electronic subsystem, comparing the first playback value and the sensed third playback value, and then, after the comparing, adjusting the playback value of the first playback characteristic of the second media using the second electronic subsystem when the second media is being played back by the second electronic subsystem, where the adjusting is based on the comparing. Alternatively, process  400  may also include sensing a third playback value of the first playback characteristic of the second media using the first electronic subsystem when the second media is being played back by the second electronic subsystem, comparing the first playback value and the sensed third playback value, and then, after the comparing, adjusting the playback value of the first playback characteristic of the second media using the second electronic subsystem when the second media is being played back by the second electronic subsystem, where the adjusting is based on the comparing and the first relationship value. 
     It is to be understood that the steps shown in process  400  of  FIG. 4  is merely illustrative and that existing steps may be modified or omitted, additional steps may be added, and the order of certain steps may be altered. 
       FIG. 5  is a flowchart of an illustrative process  500  for transitioning the playback of media. Process  500  may begin at step  502  by playing back first media using a first playback component of a first electronic subsystem. For example, as described above with respect to  FIGS. 1-3B , first electronic subsystem  10  of system  1  may be configured to playback first played back media  121  and/or first played back accessory media  131 . Next, at step  504 , process  500  may include determining a first playback value of a first playback characteristic of the played back first media. For example, as described above, system  1  may determine the first playback value with first sensed playback characteristic value data  311 , first accessory sensed playback characteristic value data  357 , first internal playback characteristic value data  313 , first internal accessory playback characteristic value data  353 , first sensed accessory playback characteristic value data  341 , and/or first sensed accessory playback characteristic value data  351 . 
     Next, at step  506 , process  500  may include playing back second media with an initial playback value of the first playback characteristic using a second playback component of a second electronic subsystem. For example, as described above, system  1  may include using shared initial playback control data  315  to dictate an initial playback value of the first playback characteristic of second played back audio media  221  and/or second played back accessory media  231  by second electronic subsystem  20 . Then, during the playing back of the second media with the initial playback value at step  506 , process  500  may also include step  508  that may determine a second playback value of the first playback characteristic of the played back second media using a first sensor of the first electronic subsystem. For example, as described above, first electronic subsystem  10  may determine a second playback value of the first playback characteristic of the played back second media using second sensed playback characteristic value data  327 , second accessory sensed playback characteristic value data  369 , second sensed accessory playback characteristic value data  343 , second sensed accessory playback characteristic value data  355 , second sensed playback characteristic value data  427 , second accessory sensed playback characteristic value data  469 , second internal playback characteristic value data  413 , second internal accessory playback characteristic value data  453 , second sensed accessory playback characteristic value data  443 , and/or second sensed accessory playback characteristic value data  455 ). 
     Next, at step  510 , process  500  may include comparing the determined first playback value and the determined second playback value. For example, as described above, system  1  may include comparing the first playback value and the second playback value to generate shared adjustment playback control data  329 . Then, after the comparing of step  510 , process  500  may include step  512  that may include adjusting the playback value of the first playback characteristic of the second media from the initial playback value of the first playback characteristic to an adjusted playback value of the first playback characteristic using the second playback component when the second media is being played back by the second electronic subsystem, where the adjusted playback value of the first playback characteristic is based on the comparing. For example, as described above, shared adjustment playback control data  329  may adjust the playback value of the first playback characteristic of the second media from the initial playback value of the first playback characteristic to an adjusted playback value of the first playback characteristic using media playback component  212  and/or media playback component  292  when the second media is being played back by second electronic subsystem  20  as adjusted third played back media  223  and/or adjusted third played back media  233 . 
     In some embodiments, the first playback characteristic of process  500  may include one of a volume, a brightness, a white point, and a spectral content. Prior to the playing back the second media with the initial playback value of the first playback characteristic of step  506 , process  500  may also include determining a first relationship value of a first relationship characteristic between the first electronic subsystem and the second electronic subsystem, and the initial playback value of the first playback characteristic may be based on at least one of the first playback value and the first relationship value. In such embodiments, the first relationship characteristic may include one of a distance and an orientation between the first electronic subsystem and the second electronic subsystem. In some embodiments, the determining the first playback value of the first playback characteristic of step  504  may include using the first sensor. Alternatively, the determining the first playback value of the first playback characteristic of step  504  may not include using the first sensor. In yet other embodiments, the determining the first playback value of the first playback characteristic of step  504  may include using a calendar application of the first electronic subsystem. 
     In some particular embodiments, process  500  may also include, after step  502  but before step  506 , determining an ambient value of the first playback characteristic, where the adjusted playback value of the first playback characteristic may be based on the determined ambient value and the comparing of step  510 . In yet other embodiments, process  500  may also include detecting an occurrence of a subsystem transition event and, in response to the detection of the occurrence, playing back third media with a third playback value of the first playback characteristic using a third playback component of a third electronic subsystem. In such embodiments, the occurrence of the subsystem transition event may include at least one of the adjusted playback value of the first playback characteristic reaching a cut-off value and a relationship value between the first electronic subsystem and the third electronic subsystem reaching a threshold value. 
     It is to be understood that the steps shown in process  500  of  FIG. 5  is merely illustrative and that existing steps may be modified or omitted, additional steps may be added, and the order of certain steps may be altered. 
       FIG. 6  is a flowchart of an illustrative process  600  for transitioning the playback of media. Process  600  may begin at step  602  by determining a first value of a first playback characteristic of first media for playback with a first media playback component of a first electronic subsystem. For example, as described above with respect to  FIGS. 1-3B , system  1  may determine the first playback value with first sensed playback characteristic value data  311 , first accessory sensed playback characteristic value data  357 , first internal playback characteristic value data  313 , first internal accessory playback characteristic value data  353 , first sensed accessory playback characteristic value data  341 , and/or first sensed accessory playback characteristic value data  351 . Next, at step  604 , process  600  may include playing back second media with an initial value of the first playback characteristic using a second media playback component of a second electronic subsystem when the second media playback component is positioned at a first location. For example, as described above, system  1  may include an initial playback value of the first playback characteristic of second played back audio media  221  and/or of second played back accessory media  231  as played back by second electronic subsystem  20  at location L 2 . Then, at step  606 , process  600  may also include determining a second value of the first playback characteristic of the played back second media using a first sensor of the first electronic subsystem when the first sensor is positioned at a second location. For example, as described above, sensor  114  and/or sensor  194  of first electronic subsystem  10  at location L 1  may determine a second value of the first playback characteristic of second played back media  221  and/or second played back accessory media  231 . 
     Next, at step  608 , process  600  may include comparing the determined first value and the determined second value. For example, as described above, system  1  may include comparing the first playback value and the second playback value to generate shared adjustment playback control data  329 . Then, after the comparing of step  608 , process  600  may include step  610  that may include adjusting the value of the first playback characteristic of the second media from the initial value to an adjusted value using the second electronic subsystem, where the adjusting the value is based on the comparison. For example, as described above, shared adjustment playback control data  329  may adjust the playback value of the first playback characteristic of the second media from the initial playback value of the first playback characteristic to an adjusted playback value of the first playback characteristic using media playback component  212  and/or media playback component  292  when the second media is being played back by second electronic subsystem  20  as adjusted third played back media  223  and/or adjusted third played back media  233 . 
     In some embodiments, process  600  may also include determining a distance between the first location and the second location, where the adjusting the value may include adjusting the value based on the comparison and based on the determined distance. In other embodiments, process  600  may include determining an orientation of the first sensor with respect to the second media playback component when the first sensor is positioned at the second location and when the second media playback component is positioned at the first location, where the adjusting the value may include adjusting the value based on the comparison and based on the determined orientation. In yet other embodiments, process  600  may also include determining a distance between the first location and the second location and determining an orientation of the first sensor with respect to the second media playback component when the first sensor is positioned at the second location and when the second media playback component is positioned at the first location, where the adjusting the value may include adjusting the value based on the comparison, the determined distance, and the determined orientation. In still yet other embodiments, before step  606 , process  600  may also include instructing a user to maintain the first sensor in a particular fashion with respect to the second media playback component. 
     In some embodiments, prior to the playing back the second media of step  604 , process  600  may also include playing back the first media with the first media playback component, where the playing back the first media may include streaming the first media from a server with the first media playback component and the playing back the second media may include streaming the second media from the server with the second media playback component. In some other embodiments, prior to the playing back the second media of step  604 , process  600  may also include playing back the first media with the first media playback component, where the playing back the first media may include playing back the first media from a local memory of the first electronic subsystem with the first media playback component and the playing back the second media may include streaming the second media from the local memory of the first electronic subsystem with the second media playback component. In still yet other embodiments, prior to the playing back the second media of step  604 , process  600  may also include playing back the first media with the first media playback component, where the playing back the first media may include playing back the first media from a first local memory of the first electronic subsystem with the first media playback component and the playing back the second media may include playing back the second media from a second local memory of the second electronic subsystem with the second media playback component. 
     In some embodiments, after the adjusting of step  610 , process  600  may also include determining a third value of the first playback characteristic of the played back second media using the first sensor when the first sensor is positioned at the second location, where the adjusting may ensure that the determined first value is equal to the determined third value. In other embodiments, before playing back the second media at step  604 , process  600  may also include determining an ambient value of the first playback characteristic, where the adjusting the value of the first playback characteristic of the second media of step  610  may be based on the comparison and the determined ambient value. 
     It is to be understood that the steps shown in process  600  of  FIG. 6  is merely illustrative and that existing steps may be modified or omitted, additional steps may be added, and the order of certain steps may be altered. 
       FIG. 7  is a flowchart of an illustrative process  700  for transitioning the playback of media. Process  700  may begin at step  702  by playing back first media with a first playback value of a first playback characteristic using a second electronic subsystem. For example, as described above with respect to  FIGS. 1-3C , original second electronic subsystem  20  may playback media  221  and/or media  231  with a first playback value of a first playback characteristic. Then, during the playing back of the first media at step  702 , process  700  may also include detecting an occurrence of a subsystem transition event using a first electronic subsystem at step  704 . For example, as described above, first electronic subsystem  10  of system  1  may be configured to detect an occurrence of a subsystem transition event (e.g., when a certain cut-off value of a playback characteristic value of output media  121 / 131  of original second electronic subsystem  20  is reached and/or when a certain threshold value of a relationship value between first electronic subsystem  10  and other second electronic subsystem  20   a  is reached). Then, in response to the detection of the occurrence at step  704 , process  700  may also include playing back second media with a second playback value of the first playback characteristic using the third electronic subsystem. For example, as described above, in response to the detection of an occurrence of a subsystem transition event, media  121 ,  131 ,  221 , and/or  231  may be played back by other second electronic subsystem  20   a  with a second playback value of the first playback characteristic. 
     In some embodiments, the occurrence of the subsystem transition event of process  700  may include the first playback value reaching a cut-off value. In such embodiments, the first playback characteristic may include a volume and the cut-off value may include an upper threshold or a lower threshold of a volume output level of the second electronic subsystem. In other embodiments, the occurrence of the subsystem transition event of process  700  may include a relationship value between the first electronic subsystem and the third electronic subsystem reaching a threshold value. In such embodiments, the relationship value may include one of a distance and an orientation between the first electronic subsystem and the third electronic subsystem. 
     It is to be understood that the steps shown in process  700  of  FIG. 7  is merely illustrative and that existing steps may be modified or omitted, additional steps may be added, and the order of certain steps may be altered. 
     Moreover, the processes described with respect to  FIGS. 1-7 , as well as any other aspects of the invention, may each be implemented by software, but may also be implemented in hardware, firmware, or any combination of software, hardware, and firmware. They each may also be embodied as machine- or computer-readable code recorded on a machine- or computer-readable medium. The computer-readable medium may be any data storage device that can store data or instructions which can thereafter be read by a computer system. Examples of the computer-readable medium may include, but are not limited to, read-only memory, random-access memory, flash memory, CD-ROMs, DVDs, magnetic tape, and optical data storage devices (e.g., memory  104 , memory  184 , memory  204 , memory  284 , server  70 , server  170 , and/or server  270  of  FIG. 1 ). The computer-readable medium can also be distributed over network-coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. For example, the computer-readable medium may be communicated from one electronic subsystem or device to another electronic subsystem or device using any suitable communications protocol (e.g., the computer-readable medium may be communicated to first electronic subsystem  10  via communications circuitry  106  from server  70  and/or second electronic subsystem  20 . The computer-readable medium may embody computer-readable code, instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and may include any information delivery media. A modulated data signal may be a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal. 
     It is to be understood that any or each module of any one or more of first device control system  301 , first accessory control system  381 , second device control system  401 , and second accessory control system  481  may be provided as a software construct, firmware construct, one or more hardware components, or a combination thereof. For example, any one or more of first device control system  301 , first accessory control system  381 , second device control system  401 , and second accessory control system  481  may be described in the general context of computer-executable instructions, such as program modules, that may be executed by one or more computers or other devices. Generally, a program module may include one or more routines, programs, objects, components, and/or data structures that may perform one or more particular tasks or that may implement one or more particular abstract data types. It is also to be understood that the number, configuration, functionality, and interconnection of the modules of any one or more of first device control system  301 , first accessory control system  381 , second device control system  401 , and second accessory control system  481  are merely illustrative, and that the number, configuration, functionality, and interconnection of existing modules may be modified or omitted, additional modules may be added, and the interconnection of certain modules may be altered. 
     At least a portion of one or more of the modules of any one or more of first device control system  301 , first accessory control system  381 , second device control system  401 , and second accessory control system  481  may be stored in or otherwise accessible to first electronic subsystem  10  and/or second electronic subsystem  20  in any suitable manner (e.g., in memory  104  of device  100 , in memory  184  of device  180 , in memory  204  of device  200 , in memory  284  of device  280 , in server  70 , in server  170 , and/or in server  270 ). Any or each module of any one or more of first device control system  301 , first accessory control system  381 , second device control system  401 , and second accessory control system  481  may be implemented using any suitable technologies (e.g., as one or more integrated circuit devices), and different modules may or may not be identical in structure, capabilities, and operation. Any or all of the modules or other components of any one or more of first device control system  301 , first accessory control system  381 , second device control system  401 , and second accessory control system  481  may be mounted on an expansion card, mounted directly on a system motherboard, or integrated into a system chipset component (e.g., into a “north bridge” chip). Any one or more of first device control system  301 , first accessory control system  381 , second device control system  401 , and second accessory control system  481  may include any amount of dedicated media playback memory, may include no dedicated media playback memory and may rely on device memory or network memory (e.g., memory of server  70 ), or may use any combination thereof. 
     Any one or more of first device control system  301 , first accessory control system  381 , second device control system  401 , and second accessory control system  481  may be a dedicated system implemented using one or more expansion cards adapted for various bus standards. For example, all of the modules of a system may be mounted on different interconnected expansion cards or all of the modules of a system may be mounted on one expansion card. With respect to first device control system  301 , by way of example only, the modules of system  301  may interface with a motherboard or processor  102  of device  100  through an expansion slot (e.g., a peripheral component interconnect (“PCI”) slot or a PCI express slot). Alternatively, system  301  need not be removable but may include one or more dedicated modules that may include memory (e.g., RAM) dedicated to the utilization of the module. In other embodiments, system  301  may be a system integrated into device  100 . For example, a module of system  301  may utilize a portion of device memory  104  of device  100 . One or more of the modules of first device control system  301  may include its own processing circuitry and/or memory. Alternatively each module of first device control system  301  may share processing circuitry and/or memory with any other module of first device control system  301  and/or processor  102  and/or memory  104  of device  100 . Similar configurations may be provided for second device control system  401  with respect to device  200 , for first accessory control system  381  with respect to device  380 , and/or for second accessory control system  481  with respect to device  480 . 
     One or more Application Programming Interfaces (“APIs”) may be used in some embodiments (e.g., with respect to first device control system  301 , first accessory control system  381 , second device control system  401 , second accessory control system  481 , or any other suitable module or any other suitable portion of any suitable module of first device control system  301 , first accessory control system  381 , second device control system  401 , and/or second accessory control system  481  of  FIGS. 1-3C ). An API may be an interface implemented by a program code component or hardware component (hereinafter “API-implementing component”) that may allow a different program code component or hardware component (hereinafter “API-calling component”) to access and use one or more functions, methods, procedures, data structures, classes, and/or other services provided by the API-implementing component. An API can define one or more parameters that may be passed between the API-calling component and the API-implementing component. 
     An API may allow a developer of an API-calling component, which may be a third party developer, to leverage specified features provided by an API-implementing component. There may be one API-calling component or there may be more than one such component. An API can be a source code interface that a computer system or program library may provide in order to support requests for services from an application. An operating system (“OS”) can have multiple APIs to allow applications running on the OS to call one or more of those APIs, and a service (e.g., a program library) can have multiple APIs to allow an application that uses the service to call one or more of those APIs. An API can be specified in terms of a programming language that can be interpreted or compiled when an application is built. 
     In some embodiments, the API-implementing component may provide more than one API, each providing a different view of or with different aspects that access different aspects of the functionality implemented by the API-implementing component. For example, one API of an API-implementing component can provide a first set of functions and can be exposed to third party developers, and another API of the API-implementing component can be hidden (e.g., not exposed) and can provide a subset of the first set of functions and can also provide another set of functions, such as testing or debugging functions which are not in the first set of functions. In other embodiments, the API-implementing component may itself call one or more other components via an underlying API and may thus be both an API-calling component and an API-implementing component. 
     An API may define the language and parameters that API-calling components may use when accessing and using specified features of the API-implementing component. For example, an API-calling component may access the specified features of the API-implementing component through one or more API calls or invocations (e.g., embodied by function or method calls) exposed by the API and may pass data and control information using parameters via the API calls or invocations. The API-implementing component may return a value through the API in response to an API call from an API-calling component. While the API may defines the syntax and result of an API call (e.g., how to invoke the API call and what the API call does), the API may not reveal how the API call accomplishes the function specified by the API call. Various API calls may be transferred via the one or more application programming interfaces between the calling component (e.g., API-calling component) and an API-implementing component. Transferring the API calls may include issuing, initiating, invoking, calling, receiving, returning, or responding to the function calls or messages. Thus, transferring can describe actions by either of the API-calling component or the API-implementing component. The function calls or other invocations of the API may send or receive one or more parameters through a parameter list or other structure. A parameter can be a constant, key, data structure, object, object class, variable, data type, pointer, array, list, or a pointer to a function or method or another way to reference a data or other item to be passed via the API. 
     Furthermore, data types or classes may be provided by the API and implemented by the API-implementing component. Thus, the API-calling component may declare variables, use pointers to, use or instantiate constant values of such types or classes by using definitions provided in the API. 
     Generally, an API can be used to access a service or data provided by the API-implementing component or to initiate performance of an operation or computation provided by the API-implementing component. By way of example, the API-implementing component and the API-calling component may each be any one of an operating system, a library, a device driver, an API, an application program, or other module. It should be understood that the API-implementing component and the API-calling component may be the same or different type of module from each other. API-implementing components may in some cases be embodied at least in part in firmware, microcode, or other hardware logic. In some embodiments, an API may allow a client program to use the services provided by a Software Development Kit (“SDK”) library. In other embodiments, an application or other client program may use an API provided by an Application Framework. In such embodiments, the application or client program may incorporate calls to functions or methods provided by the SDK and provided by the API or may use data types or objects defined in the SDK and provided by the API. An Application Framework may, in these embodiments, provide a main event loop for a program that responds to various events defined by the Framework. The API may allow the application to specify the events and the responses to the events using the Application Framework. In some implementations, an API call can report to an application the capabilities or state of a hardware device, including those related to aspects such as input capabilities and state, output capabilities and state, processing capability, power state, storage capacity and state, communications capability, and the like, and the API may be implemented in part by firmware, microcode, or other low level logic that may execute in part on the hardware component. 
     The API-calling component may be a local component (i.e., on the same data processing system as the API-implementing component) or a remote component (i.e., on a different data processing system from the API-implementing component) that may communicate with the API-implementing component through the API over a network. It should be understood that an API-implementing component may also act as an API-calling component (i.e., it may make API calls to an API exposed by a different API-implementing component) and an API-calling component may also act as an API-implementing component by implementing an API that may be exposed to a different API-calling component. 
     The API may allow multiple API-calling components written in different programming languages to communicate with the API-implementing component, such that the API may include features for translating calls and returns between the API-implementing component and the API-calling component. However, the API may be implemented in terms of a specific programming language. An API-calling component can, in some embodiments, call APIs from different providers, such as a set of APIs from an OS provider and another set of APIs from a plug-in provider and another set of APIs from another provider (e.g., the provider of a software library) or creator of the another set of APIs. 
       FIG. 8  is a block diagram illustrating an exemplary API architecture  800 , which may be used in some embodiments of the invention. As shown in  FIG. 8 , the API architecture  800  may include an API-implementing component  810  (e.g., an operating system, a library, a device driver, an API, an application program, software, or other module) that may implements an API  820 . API  820  may specify one or more functions, methods, classes, objects, protocols, data structures, formats, and/or other features of API-implementing component  810  that may be used by an API-calling component  830 . API  820  can specify at least one calling convention that may specify how a function in API-implementing component  810  may receive parameters from API-calling component  830  and how the function may return a result to API-calling component  830 . API-calling component  830  (e.g., an operating system, a library, a device driver, an API, an application program, software, or other module), may make API calls through API  820  to access and use the features of API-implementing component  810  that may be specified by API  820 . API-implementing component  810  may return a value through API  820  to API-calling component  830  in response to an API call. 
     It is to be appreciated that API-implementing component  810  may include additional functions, methods, classes, data structures, and/or other features that may not be specified through API  820  and that may not be available to API-calling component  830 . It is to be understood that API-calling component  830  may be on the same system as API-implementing component  810  or may be located remotely and may access API-implementing component  810  using API  820  over a network. While  FIG. 8  illustrates a single API-calling component  830  interacting with API  820 , it is to be understood that other API-calling components, which may be written in different languages than, or the same language as, API-calling component  830 , may use API  820 . 
     API-implementing component  810 , API  820 , and API-calling component  830  may each be implemented by software, but may also be implemented in hardware, firmware, or any combination of software, hardware, and firmware. They each may also be embodied as machine- or computer-readable code recorded on a machine- or computer-readable medium. The computer-readable medium may be any data storage device that can store data or instructions which can thereafter be read by a computer system. Examples of the computer-readable medium may include, but are not limited to, read-only memory, random-access memory, flash memory, CD-ROMs, DVDs, magnetic tape, and optical data storage devices (e.g., memory  104 , memory  184 , memory  204 , memory  284 , server  70 , server  170 , and/or server  270  of  FIG. 1 ). The computer-readable medium can also be distributed over network-coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. For example, the computer-readable medium may be communicated from one electronic device to another electronic device using any suitable communications protocol (e.g., the computer-readable medium may be communicated to electronic device  100  via communications circuitry  106  from server  70  and/or electronic device  200  of  FIG. 1 ). The computer-readable medium may embody computer-readable code, instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and may include any information delivery media. A modulated data signal may be a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal. 
       FIG. 9  is a block diagram illustrating an exemplary software stack  900 , which may be used in some embodiments of the invention. As shown in  FIG. 9 , Application A  901  and Application B  909  can make calls to Service A  921  or Service B  929  using several Service APIs (e.g., Service APIs  913 ,  915 , and  917 ) and to Operating System (“OS”)  940  using several OS APIs (e.g., OS APIs  933  and  937 ). Service A  921  and Service B  929  can make calls to OS  940  using several OS APIs (e.g., OS APIs  933  and  937 ). 
     For example, as shown in  FIG. 9 , Service B  929  may include two APIs, one of which (i.e., Service B API- 1   915 ) may receive calls from and return values to Application A  901  and the other of which (i.e., Service B API- 2   917 ) may receive calls from and return values to Application B  909 . Service A  921 , which can be, for example, a software library, may make calls to and receive returned values from OS API- 1   933 , and Service B  929 , which can be, for example, a software library, may make calls to and receive returned values from both OS API- 1   933  and OS API- 2   937 . Application B  909  may make calls to and receive returned values from OS API- 2   937 . 
     While there have been described systems, methods, and computer-readable media for transitioning media playback between multiple electronic devices, it is to be understood that many changes may be made therein without departing from the spirit and scope of the invention. Insubstantial changes from the claimed subject matter as viewed by a person with ordinary skill in the art, now known or later devised, are expressly contemplated as being equivalently within the scope of the claims. Therefore, obvious substitutions now or later known to one with ordinary skill in the art are defined to be within the scope of the defined elements. 
     Therefore, those skilled in the art will appreciate that the invention can be practiced by other than the described embodiments, which are presented for purposes of illustration rather than of limitation.

Metadata:
Filing Date: 20130729
Publication Date: 20180306
Grant Date: 20180306
Priority Date: 20130729
Inventors: DUDLEY JAMES JOSEPH
Assignee: APPLE INC
CPC Classifications: [{"code": "H04N21/4223", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/4325", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/4431", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/42203", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/42219", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/42224", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04N21/43637", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/4325", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/42203", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/4325", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/42224", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04N21/42224", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04N21/4223", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/41265", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/43637", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/4431", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/41265", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/43637", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/42203", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/4431", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N21/4223", "inventive": true, "first": false, "tree": "[]"}]
Family ID: 52391409