Patent Publication Number: US-10334365-B2

Title: Acoustic processing device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     Priority is claimed on Japanese Patent Application No. 2017-055299, filed Mar. 22, 2017, the content of which is incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to an acoustic processing device. 
     Description of Related Art 
     In recent years, acoustic processing devices such as guitar amplifier loudspeakers have become known. In such an acoustic processing device, an acoustic processing unit and a loudspeaker unit are included, and acoustic processing for applying an acoustic effect to input sound data is performed by the acoustic processing unit and resultant sound data is output from the loudspeaker unit. Further, a technology for widening a sound field in a pseudo manner without impairing a sensation of sound localization with loudspeakers disposed with a narrow interval therebetween is known (see, for example, Japanese Patent No. 5206137 (hereinafter referred to as Patent Document 1)). 
     SUMMARY OF THE INVENTION 
     However, in the acoustic processing device described above, for example, when the acoustic processing unit such as a guitar amplifier loudspeaker and the loudspeaker unit are integrally configured, a layout of the loudspeaker units is fixed at a narrow interval, and the sensation of sound localization and the spread of the sound field cannot be obtained in some cases. Further, in the technology for widening a sound field in a pseudo manner described in Patent Document 1, there is a possibility of the sensation of sound localization and the spread of the sound field being insufficient. 
     The present invention has been made to solve the above problems. An exemplary object of the present invention is to provide an acoustic processing device capable of suitably obtaining a sensation of sound localization and a spread of a sound field. 
     An acoustic processing device according to an aspect of the present invention includes: a plurality of loudspeaker units that output sound; and a mechanism that is configured to be capable of changing a distance between the loudspeaker units. 
     An acoustic processing device according to an aspect of the present invention includes: an electrical component unit and a plurality of loudspeaker units. The electrical component unit includes an acoustic processing unit, an output unit, and an operation unit. The acoustic processing unit executes acoustic processing on input sound data. The output unit outputs the sound data on which the acoustic processing is executed. The operation unit receives an operation on the acoustic processing unit. The electrical component unit is configured to be detachable. The loudspeaker units output sound generated based on the sound data on which the acoustic processing is executed. 
     According to the present invention, it is possible to suitably obtain a sensation of sound localization and a spread of a sound field. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  is a configuration diagram illustrating an example of an acoustic processing device according to a first embodiment. 
         FIG. 1B  is a configuration diagram illustrating the example of the acoustic processing device according to the first embodiment. 
         FIG. 2  is a functional block diagram illustrating an example of the acoustic processing device according to the first embodiment. 
         FIG. 3A  is a diagram illustrating an example of a separation mechanism and a rotation mechanism in the first embodiment. 
         FIG. 3B  is a diagram illustrating the example of the separation mechanism and the rotation mechanism in the first embodiment. 
         FIG. 3C  is a diagram illustrating the example of the separation mechanism and the rotation mechanism in the first embodiment. 
         FIG. 4A  is a configuration diagram illustrating an example of an acoustic processing device according to a second embodiment. 
         FIG. 4B  is a configuration diagram illustrating the example of the acoustic processing device according to the second embodiment. 
         FIG. 5A  is a diagram illustrating an example of a separation mechanism in the second embodiment. 
         FIG. 5B  is a diagram illustrating the example of the separation mechanism in the second embodiment. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Hereinafter, an acoustic processing device according to embodiments of the present invention will be described with reference to the drawings. 
     First Embodiment 
       FIGS. 1A and 1B  are configuration diagrams illustrating an example of an acoustic processing device  1  according to a first embodiment.  FIG. 2  is a functional block diagram illustrating an example of the acoustic processing device  1  according to the embodiment. 
     As illustrated in  FIGS. 1A and 1B  and  FIG. 2 , the acoustic processing device  1  includes an electrical component unit  10  and loudspeaker units ( 20 L and  20 R). The acoustic processing device  1  is, for example, a portable guitar amplifier loudspeaker, and functions as a multi-effector. The acoustic processing device  1  receives a performance of the guitar  2 , executes acoustic processing for applying an acoustic effect for an input sound and outputs (emits) the sound subjected to acoustic processing from the loudspeaker units ( 20 L,  20 R). 
     Further, in the acoustic processing device  1 , the electrical component unit  10  is configured to be detachable, and each of the loudspeaker units ( 20 L,  20 R) is configured to be separable.  FIG. 1A  illustrates an external view of the acoustic processing device  1  in a case in which the electrical component unit  10  and the loudspeaker units ( 20 L,  20 R) are not separated from each other.  FIG. 1B  illustrates a configuration example of the acoustic processing device  1  in a case in which the electrical component unit  10  and the loudspeaker units ( 20 L,  20 R) are separated from each other (in a case in which the electrical component unit  10  is detached from the loudspeaker units ( 20 L,  20 R)). Details of the configuration in which the electrical component unit  10  and the loudspeaker units ( 20 L,  20 R) are separated from each other will be described below. 
     Note that, in the following description, it is assumed that a longitudinal direction of a sound emission surface of the loudspeaker unit ( 20 L,  20 R) of the acoustic processing device  1  is an X-axis direction, a depth direction orthogonal to the longitudinal direction of the acoustic processing device  1  is a Y-axis direction, and a height direction of the acoustic processing device  1  is a Z-axis direction. 
     The electrical component unit  10  includes an operation unit  11 , an input unit  12 , an acoustic processing unit  13 , a communication unit  14 , an output unit  15 , and a storage unit  16 , executes, for example, various types of acoustic processing for an input sound, and functions as, for example, a multi-effector. The electrical component unit  10  can be used in cooperation with the loudspeaker units ( 20 L,  20 R) via the communication unit  14  and can also be used alone without cooperation with the loudspeaker units ( 20 L,  20 R) by using the output unit  15 . 
     The operation unit  11  is, for example, a switch or an operation knob for receiving various operations of the acoustic processing device  1 . The operation unit  11  may include an output terminal  110  such as a line out terminal or a line out jack. The output terminal  110  output to an external device such as an external loudspeaker  5 , the sound data on which the acoustic processing is executed. The input unit  12  includes, for example, an analog to digital converter (ADC), receives a sound signal from the guitar  2 , converts the sound signal into sound data, and supplies the sound data to the acoustic processing unit  13 . 
     The acoustic processing unit  13  is, for example, a processor such as a digital signal processor (DSP), and executes acoustic processing of applying a sound effect to the sound data input from the input unit  12 . Here, the acoustic processing is, for example, various types of effect processing such as those of a compressor, an equalizer (EQ), and a delay, or processing for applying various effects such as pitch shifting, time stretching, and band extension. Further, the acoustic processing also includes so-called bypass processing for passing sound data without performing any processing on the sound data. The acoustic processing unit  13  executes, for example, acoustic processing based on various operations using the operation unit  11  and outputs the sound data subjected to the acoustic processing to the communication unit  14  or the output unit  15 . Further, the acoustic processing unit  13  may store setting information of the acoustic processing in the storage unit  16  to be described below or acquire the setting information from the storage unit  16 . 
     The communication unit  14  transmits the sound data subjected to acoustic processing by the acoustic processing unit  13  to the loudspeaker units ( 20 L,  20 R) through wireless communication such as Bluetooth (registered trademark) or infrared communication to cause sound based on the sound data transmitted to the loudspeaker units ( 20 L,  20 R) to be output. 
     The output unit  15  is, for example, a line output unit and outputs a sound signal based on the sound data subjected to acoustic processing by the acoustic processing unit  13 . 
     The storage unit  16  stores information that is used for various types of processing of the acoustic processing device  1 . The storage unit  16  stores, for example, acoustic processing setting information. 
     The loudspeaker unit  20 L is, for example, an L channel loudspeaker device and the loudspeaker unit  20 R is, for example, an R channel loudspeaker device. The loudspeaker unit  20 L includes a communication unit  21 L, an amplification unit  22 L, and a loudspeaker  23 L. Further, the loudspeaker unit  20 R includes a communication unit  21 R, an amplification unit  22 R, and a loudspeaker  23 R. 
     Note that the loudspeaker unit  20 L and the loudspeaker unit  20 R have the same configuration and will be described as a loudspeaker unit  20  when any loudspeaker unit included in the acoustic processing device  1  is indicated or when the loudspeaker unit  20 L and the loudspeaker unit  20 R are not being particularly distinguished from each other. Further, the communication unit  21 L and the communication unit  21 R, the amplification unit  22 L and the amplification unit  22 R, and the loudspeaker  23 L and the loudspeaker  23 R will be similarly described as a communication unit  21 , an amplification unit  22 , and a loudspeaker  23  when any of these configurational components included in the acoustic processing device  1  is indicated or when the communication unit  21 L and the communication unit  21 R, the amplification unit  22 L and the amplification unit  22 R, and the loudspeaker  23 L and the loudspeaker  23 R are not being particularly distinguished from each other. 
     The communication unit  21  receives the sound data subjected to the acoustic processing by the acoustic processing unit  13  through the same wireless communication as the above-described communication unit  14 . The communication unit  21  outputs the received sound data to the amplification unit  22 . 
     The amplification unit  22  is, for example, an amplifier with a digital to analog converter (DAC) and outputs a sound signal obtained by converting and amplifying the acquired sound data to the loudspeaker  23  to cause sound to be output from the loudspeaker  23 . 
     The loudspeaker  23  converts the sound signal output from the amplification unit  22  into a sound and outputs (emits) the sound. 
     Further, as illustrated in  FIG. 1B , the acoustic processing device  1  includes a separation mechanism  30  configured to be able to move relative positions between a plurality of (for example, two) the loudspeaker units  20 . Here, the relative position is a position relative to the other loudspeaker unit  20 . For example, when there are two loudspeaker units  20 , the relative position indicates a relative position between the two loudspeaker units  20 . 
     In the acoustic processing device  1 , the electrical component unit  10  is configured to be detachable, and the loudspeaker unit  20 L and the loudspeaker unit  20 R after the electrical component unit  10  has been separated therefrom are separated by the separation mechanism  30 . 
     The separation mechanism  30  separates and moves the two loudspeaker units  20  ( 20 L,  20 R) in the longitudinal direction (an X-axis direction) of the acoustic processing device  1  to change a layout of the two loudspeaker units  20 . The separation mechanism  30  includes a back panel  31 , a rack and pinion mechanism  32 , guide rails ( 33 ,  35 ), support members ( 34 ,  36 ), upper plates ( 41 ,  51 ), and lower plates ( 42 ,  52 ). That is, separation mechanism (mechanism)  30  is configured to be capable of changing a distance between the two loudspeaker units  20  ( 20 L,  20 R). 
     The back panel  31  is a plate disposed on a back surface of the two loudspeaker units  20 , fixes the rack and pinion mechanism  32 , and fixes the support members ( 34 ,  36 ). 
     The rack and pinion mechanism  32  moves the two loudspeaker units  20  in the longitudinal direction (the X-axis direction) of the acoustic processing device  1  to uniformly separate the two loudspeaker units  20  from a longitudinal center of the acoustic processing device  1 . The rack and pinion mechanism  32  includes a pinion portion  321  and rack portions ( 322 ,  323 ). 
     The pinion portion  321  is a circular gear, and the circular gear is rotatably installed on the back panel  31 . The pinion portion  321  is disposed so that teeth of the rack portions ( 322 ,  323 ) to be described below mesh with teeth of the gear. When the pinion portion  321  rotates, the rack portions ( 322 ,  323 ) are moved in the longitudinal direction (the X-axis direction) of the acoustic processing device  1 . 
     The rack portions ( 322 ,  323 ) are flat plate-like bars with teeth that mesh with teeth of the gear of the pinion portion  321 . The rack portions ( 322 ,  323 ) are disposed parallel to the longitudinal direction (the X-axis direction) of the acoustic processing device  1  and are moved uniformly from a center in the longitudinal direction as the pinion portion  321  rotates. The rack portion  322  is connected to the back surface of the loudspeaker unit  20 L, and the rack portion  322  moves in the longitudinal direction (the X-axis direction) to move the loudspeaker unit  20 L. Further, the rack portion  323  is connected to the back surface of the loudspeaker unit  20 R, and the rack portion  323  moves in the longitudinal direction (the X-axis direction) to move the loudspeaker unit  20 R. Here, the back surface of the loudspeaker unit  20 L and the back surface of the loudspeaker unit  20 R are surfaces opposite to the sound emission surface. 
     A guide rail  33  is installed on the back surface of the loudspeaker unit  20 L and linearly moves the support member  34  along a shape of the rail (the guide rail  33 ), thereby linearly moving the loudspeaker unit  20 L in a longitudinal direction (the X-axis direction). Further, a guide rail  35  is installed on a back surface of the loudspeaker unit  20 R and linearly moves the support member  36  along a shape of the rail (the guide rail  35 ), thereby linearly moving the loudspeaker unit  20 R in the longitudinal direction (the X-axis direction). That is, the guide rail  33  has a shape of extending in the predetermined direction (longitudinal direction of the acoustic processing device  1 ), and supports the movement of the support member  36  along the predetermined direction. 
     The support member  34  is connected to the back panel  31  and supports the loudspeaker unit  20 L. 
     The support member  34  moves along the guide rail  33  to linearly move the loudspeaker unit  20 L. Further, the support member  36  is connected to the back panel  31  and supports the loudspeaker unit  20 R. The support member  36  moves along the guide rail  35  to linearly move the loudspeaker unit  20 R. 
     An upper plate  41  and a lower plate  42  are disposed to sandwich the loudspeaker unit  20 L vertically, and hold the loudspeaker unit  20 L by sandwiching the loudspeaker unit  20 L vertically. Further, an upper plate  51  and a lower plate  52  are disposed to sandwich the loudspeaker unit  20 R vertically and hold the loudspeaker unit  20 R by sandwiching the loudspeaker unit  20 R vertically. 
     Note that the upper plate  41  and the lower plate  42  are included in a rotation mechanism  40  that changes an orientation (a sound emission direction) of the loudspeaker unit  20 L, and the upper plate  51  and the lower plate  52  are included in a rotation mechanism  50  that changes an orientation (the sound emission direction) of the loudspeaker unit  20 R. 
     Next, details and an operation of the separation mechanism  30  and the rotation mechanism ( 40 ,  50 ) according to the embodiment will be described with reference to  FIGS. 3A to 3C . 
       FIGS. 3A to 3C  are views illustrating an example of the separation mechanism  30  and the rotation mechanism ( 40 ,  50 ) in the embodiment. 
       FIG. 3A  is a view of the loudspeaker units ( 20 L,  20 R) after the electrical component unit  10  is separated (detached) as seen from above (a Z-axis direction).  FIG. 3A  illustrates a state before the separation mechanism  30  separates the loudspeaker unit  20 L and the loudspeaker unit  20 R from each other and a state before the rotation mechanism ( 40 ,  50 ) changes an orientation of the loudspeaker unit  20 L and the loudspeaker unit  20 R. 
     As illustrated in  FIG. 3A , the acoustic processing device  1  includes the rotation mechanism  40  that changes the orientation (the sound emission direction) of the loudspeaker unit  20 L, and the rotation mechanism  50  that changes the orientation (the sound emission direction) of the loudspeaker unit  20 . 
     The rotation mechanism  40  includes the upper plate  41  and the lower plate  42 , and the upper plate  41  includes a guide groove  411  and a following pin  412 . 
     The guide groove  411  (cam groove) is disposed on the upper plate  41 , and the following pin  412  moves along the guide groove  411 , thereby changing the orientation (the sound emission direction) of the loudspeaker unit  20 L. Further, the following pin  412  (cam following pin) is disposed on the upper surface of the loudspeaker unit  20 L and is configured to be movable in the guide groove  411 . A guide groove and a following pin that are the same as the guide groove  411  and the following pin  412  are also disposed on the lower plate  42 . 
     Further, the rotation mechanism  50  includes the upper plate  51  and the lower plate  52 , and the upper plate  51  includes a guide groove  511  and a following pin  512 . 
     The guide groove  511  (cam groove) is disposed on the upper plate  51 , and the following pin  512  moves along the guide groove  511 , thereby changing the orientation (the sound emission direction) of the loudspeaker unit  20 R. Further, the following pin  512  (cam following pin) is disposed on the upper surface of the loudspeaker unit  20 R and is configured to be movable in the guide groove  511 . A guide groove and a following pin that are the same as the guide groove  511  and the following pin  512  are also disposed on the lower plate  52 . 
     Further,  FIG. 3B  illustrates an example of a state in which the separation mechanism  30  separates the loudspeaker unit  20 L and the loudspeaker unit  20 R from each other. In  FIG. 3B , as the pinion portion  321  of the rack and pinion mechanism  32  rotates, the rack portion  322  moves and the support member  34  moves along the guide rail  33 . Accordingly, the loudspeaker unit  20 L moves to the left. 
     Further, as the pinion portion  321  rotates, the rack portion  323  moves and the support member  36  moves along the guide rail  35 . Accordingly, the loudspeaker unit  20 R moves to the right. Here, a moving distance of the loudspeaker unit  20 L and a moving distance of the loudspeaker unit  20 R are the same due to the rack and pinion mechanism  32 . 
     Thus, in the embodiment, the separation mechanism  30  can move a relative distance between the loudspeaker unit  20 L and the loudspeaker unit  20 R. 
     Further,  FIG. 3C  illustrates an example of a state in which the separation mechanism  30  separates the loudspeaker unit  20 L and the loudspeaker unit  20 R from each other, and a state in which the rotation mechanism ( 40 ,  50 ) changes the orientation of the loudspeaker unit  20  ( 20 L,  20 R). 
     As illustrated in  FIG. 3C , by moving the following pin  412  along the guide groove  411  of the rotation mechanism  40 , the orientation of the loudspeaker unit  20 L is changed. Further, by moving the following pin  512  along the guide groove  511  of the rotation mechanism  50 , the orientation of the loudspeaker unit  20 R is changed. 
     Next, an operation of connecting the acoustic processing device  1  according to the embodiment to the guitar  2  and outputting a sound of the guitar  2  will be described. First, an operation when a sound is output from the loudspeaker unit  20  of the acoustic processing device  1  will be described. 
     First, the input unit  12  receives the sound signal of the guitar  2 , converts the sound signal into sound data which is a digital signal, and outputs the sound data to the acoustic processing unit  13 . The acoustic processing unit  13  executes the acoustic processing on the basis of the setting information acquired from the operation unit  11  and outputs the sound data subjected to the acoustic processing to the communication unit  14 . 
     Next, the communication unit  14  transmits the sound data output from the acoustic processing unit  13  to the communication unit  21  of the loudspeaker unit  20  through wireless communication. The communication unit  21  outputs the received sound data to the amplification unit  22 . The amplification unit  22  amplifies the sound based on the sound data received by the communication unit  21  and outputs resultant sound to the loudspeaker  23 . The operation of the loudspeaker unit  20 L and the operation of the loudspeaker unit  20 R are the same except that the sound data is different between a left channel and a right channel. 
     Thus, in the acoustic processing device  1 , the sound of the guitar  2  is subjected to acoustic processing by the acoustic processing unit  13  of the electrical component unit  10  and output from the loudspeaker unit  20 . 
     Next, an operation when the electrical component unit  10  of the acoustic processing device  1  according to the embodiment is used alone and the sound of the guitar  2  is output from an external loudspeaker device (not illustrated) will be described. 
     In such a case, the acoustic processing unit  13  of the electrical component unit  10  executes acoustic processing on the basis of the setting information acquired from the operation unit  11  and outputs the sound data subjected to the acoustic processing to the output unit  15 . The output unit  15  outputs the sound data to the loudspeaker device line-connected to the output unit  15  to cause the loudspeaker device to output the sound of the guitar  2  subjected to the acoustic processing by the acoustic processing unit  13 . 
     Thus, in the acoustic processing device  1 , it is possible to use the electrical component unit  10  alone, and it is possible to acoustically process the sound of the guitar  2  using the acoustic processing unit  13  of the electrical component unit  10  and cause the sound of the guitar  2  to be output from an external loudspeaker device via the output unit  15 . 
     Note that the acoustic processing unit  13  may perform the acoustic processing on the basis of the setting information stored in the storage unit  16 . Further, the acoustic processing unit  13  may store the setting information set by the operation unit  11  in the storage unit  16  on the basis of an instruction from the operation unit  11 . 
     As described above, the acoustic processing device  1  according to the embodiment includes the acoustic processing unit  13 , the plurality of (for example, two) loudspeaker units  20 , and the separation mechanism  30 . The acoustic processing unit  13  executes the acoustic processing for the input sound data. The plurality of loudspeaker units  20  output the sound based on the sound data for which the acoustic processing unit  13  has executed the acoustic processing. The separation mechanism  30  is configured to be able to move the positions of the plurality of loudspeaker units  20  (relative positions with respect to the other loudspeaker units  20 ) and separates the plurality of loudspeaker units  20 . 
     Accordingly, since the acoustic processing device  1  according to the embodiment can move the relative positions of the plurality of loudspeaker units  20 , it is possible to increase the distance between the plurality of loudspeaker units  20 . Therefore, the acoustic processing device  1  according to the embodiment can suitably obtain a sensation of sound localization and a spread of a sound field. 
     Further, in the embodiment, the separation mechanism  30  includes the support member  34  ( 36 ) that supports the loudspeaker unit  20 , and the guide rail  33  ( 35 ) that moves the support member  34  ( 36 ) along the shape of the rail (the guide rail  33  ( 35 )). 
     Thus, in the acoustic processing device  1  according to the embodiment, it is possible to appropriately move the relative positions of the plurality of loudspeaker units  20  with a simple configuration. 
     Further, in the embodiment, the separation mechanism  30  includes the rack-and-pinion mechanism  32  that uniformly moves the plurality of loudspeaker units  20 . 
     Thus, in the acoustic processing device  1  according to the embodiment, it is possible to suitably obtain a spread of the sound field without impairing the sensation of sound localization. 
     Further, the acoustic processing device  1  according to the embodiment includes the rotation mechanism ( 40 ,  50 ) capable of changing the orientation (the sound emission direction) of the loudspeaker unit  20 . 
     Thus, in the acoustic processing device  1  according to the embodiment, since the orientation of the loudspeaker units  20  can be changed, it is possible to increase a degree of freedom of the layout of the loudspeaker units  20  and to further suitably obtain a sensation of sound localization and a spread of the sound field. 
     Further, the acoustic processing device  1  according to the embodiment includes the electrical component unit  10  including the acoustic processing unit  13 , the output unit  15  that outputs the sound data for which the acoustic processing unit  13  has executed the acoustic processing, and the operation unit  11  that operates the acoustic processing unit  13 . The electrical component unit  10  is configured to be detachable. 
     That is, the acoustic processing device  1  according to the embodiment includes an electrical component unit  10  including the acoustic processing unit  13  that executes the acoustic processing for the input sound data, the output unit  15  that outputs the sound data for which the acoustic processing unit  13  has executed the acoustic processing, and the operation unit  11  that operates the acoustic processing unit  13  and configured to be detachable, and the plurality of loudspeaker units  20  that output a sound based on the sound data for which the acoustic processing unit  13  has executed the acoustic processing. 
     Thus, in the acoustic processing device  1  according to the embodiment, it is possible to use the electrical component unit  10  alone and to use the electrical component unit  10 , for example, as a small component amplifier. Therefore, in the acoustic processing device  1  according to the embodiment, it is possible to improve the convenience. 
     Further, for example, the user can bring the electrical component unit  10  to a studio or the like, and the sound of the guitar  2  can be subjected to acoustic processing by the electrical component unit  10  and output to a loudspeaker installed in the studio. 
     In this case, the user can create a favorite tone with an operation feeling of the electrical component unit  10  familiar from a usual situation and cause the created tone to be easily reproduced by storing the setting information in the storage unit  16 . As described above, in the acoustic processing device  1  according to the embodiment, it is possible to improve the convenience since the electrical component unit  10  is configured to be detachable. 
     Further, since the electrical component unit  10  and the loudspeaker unit  20  can be separated and used, the user can place the electrical component unit  10  in his or her hand and cause the sound to be output from the loudspeaker unit  20  at a position away from the user while operating the electrical component unit  10 , thereby improving the convenience. 
     Second Embodiment 
     Next, the acoustic processing device  1   a  according to a second embodiment will be described with reference to the drawings. 
     In this embodiment, an example in which the loudspeaker unit  20   a  is configured to be detachable will be described. 
       FIGS. 4A and 4B  are configuration diagrams illustrating an example of the acoustic processing device  1   a  according to the embodiment. 
     As illustrated in  FIGS. 4 and 4B , the acoustic processing device  1   a  includes an electrical component unit  10 , two loudspeaker units  20   a  ( 20   a L,  20   a R), and a separation mechanism  30   a.    
     Note that, in  FIGS. 4A and 4B , components the same as those in  FIG. 1  described above are denoted with the same reference numerals, and description thereof is omitted. Further, the loudspeaker unit  20   a L and the loudspeaker unit  20   a R will be described as a loudspeaker unit  20   a  when an arbitrary loudspeaker unit included in the acoustic processing device  1   a  is indicated or when the loudspeaker unit  20   a L and the loudspeaker unit  20   a R are not being particularly distinguished. 
       FIG. 4A  illustrates an external view of the acoustic processing device  1   a  when the electrical component unit  10  and the loudspeaker units  20   a  ( 20   a L,  20   a R) are not separated from each other. Since an appearance of the acoustic processing device  1   a  when the electrical component unit  10  and the loudspeaker units  20   a  ( 20   a L,  20   a R) are not separated from each other is the same as that in the first embodiment illustrated in  FIG. 1A , description thereof will be omitted herein. 
     Further,  FIG. 4B  illustrates a configuration example of the acoustic processing device  1   a  when the electrical component unit  10 , the loudspeaker unit  20   a L, and the loudspeaker unit  20   a R are separated from each other. 
     As illustrated in  FIG. 4B , the loudspeaker unit  20   a  in the embodiment is configured to be detachable. The loudspeaker unit  20   a  can be freely disposed in any position. 
     Next, details and an operation of the separation mechanism  30   a  according to the embodiment will be described with reference to  FIGS. 5A and 5B . 
       FIGS. 5A and 5B  are views illustrating an example of the separation mechanism  30   a  in the embodiment. 
       FIG. 5A  is a diagram of the loudspeaker units ( 20   a L,  20   a R) after the electrical component unit  10  is separated therefrom (after the electrical component unit  10  is detached) as viewed from above (a Z-axis direction).  FIG. 5A  illustrates a state before the separation mechanism  30   a  separates the loudspeaker unit  20   a L and the loudspeaker unit  20   a R from each other. 
     Further,  FIG. 5B  illustrates a state in which the separation mechanism  30   a  separates the loudspeaker unit  20   a L and the loudspeaker unit  20   a R from each other. 
     As illustrated in  FIGS. 5A and 5B , the separation mechanism  30   a  includes a positioning boss  37  and a magnet M 1  on a connection surface of the loudspeaker unit  20   a L, and a positioning boss  38  and a magnet M 2  on a connection surface of the loudspeaker unit  20   a R. Here, the connection surface indicates a connection surface between the loudspeaker unit  20   a L and the loudspeaker unit  20   a R. 
     The positioning boss  37  is a convex portion with a guide and is formed to coincide with a concave portion formed in an opposing portion in the connection surface of the loudspeaker unit  20   a R. Further, the positioning boss  37  fixes the loudspeaker unit  20   a L and the loudspeaker unit  20   a R using the magnet M 2  provided in the opposing concave portion. 
     Further, the positioning boss  38  is a convex portion with a guide and is formed to coincide with a concave portion formed in an opposing portion in the connection surface of the loudspeaker unit  20   a L. Further, the positioning boss  38  fixes the loudspeaker unit  20   a L and the loudspeaker unit  20   a R using the magnet M 1  provided in the opposing concave portion. 
     Thus, the loudspeaker unit  20   a L and the loudspeaker unit  20   a R are configured to be detachable using the separation mechanism  30   a , and the loudspeaker unit  20   a L and the loudspeaker unit  20   a R can be freely disposed. That is, for example, the loudspeaker unit  20   a L and the loudspeaker unit  20   a R that have been separated can be freely disposed at any distance or the orientations thereof can be changed, and the loudspeaker unit  20   a L and the loudspeaker unit  20   a R can be horizontally disposed. 
     Further, since a functional block diagram of the acoustic processing device  1   a  according to the embodiment is the same as that of the acoustic processing device  1  illustrated in  FIG. 2  described above, description thereof will be omitted herein. In the acoustic processing device  1   a  according to the embodiment, the loudspeaker unit  20 L and the loudspeaker unit  20 R are replaced with the loudspeaker unit  20   a L and the loudspeaker unit  20   a R having the same functional blocks, but functional block diagrams thereof are the same. 
     As described above, the acoustic processing device  1   a  according to the embodiment is configured to be able to move relative positions of a plurality of (for example, two) loudspeaker units  20   a , and includes a separation mechanism  30   a  that separates the plurality of loudspeaker units  20   a.    
     Accordingly, the acoustic processing device  1   a  according to the embodiment achieves the same effects as those of the first embodiment, and it is possible to suitably obtain a sensation of sound localization and a spread of a sound field. 
     Further, in the separation mechanism  30   a  of the embodiment, the two loudspeaker units  20   a  are configured to be detachable. 
     Accordingly, in the acoustic processing device  1   a  according to the embodiment, the loudspeaker unit  20   a  can be used freely in any disposition and direction, and it is possible to obtain a sensation of localization preferred by the user. Therefore, in the acoustic processing device  1   a  according to the embodiment, it is possible to more suitably obtain a sensation of sound localization and a spread of a sound field. Further, in the acoustic processing device  1   a  according to the embodiment, since it is possible to increase a degree of freedom of the layout of the loudspeaker units  20   a , it is possible to improve the convenience. 
     Note that the present invention is not limited to the above embodiments and can be changed without departing from the gist of the present invention. 
     For example, in each of the above embodiments, the example in which the acoustic processing device  1  ( 1   a ) is, for example, a guitar amplifier loudspeaker using the sound of the guitar  2  as a sound source has been described, but the present invention is not limited thereto. The acoustic processing device  1  ( 1   a ) may be a device using another musical instrument or device as the sound source, or may be any other processing device as long as the device is a device including the electrical component unit  10  and the loudspeaker unit  20  ( 20   a ). 
     Further, although the example in which wireless communication is used when the sound data is transmitted from the electrical component unit  10  to the loudspeaker unit  20  ( 20   a ) has been described in each of the above-described embodiments, the sound data may be transmitted by a wire. Further, the wireless communication scheme is not limited to the above-described scheme, and wireless communication of other schemes may be used. 
     Further, in each of the above embodiments, the example in which the two loudspeaker units  20  ( 20   a ) are separated from each other has been described as an example in which the plurality of loudspeaker units  20  ( 20   a ) are separated from one another, but the present invention is not limited to this example. For example, the acoustic processing device  1  ( 1   a ) may include three or more loudspeaker units  20  ( 20   a ) so that the respective loudspeaker units  20  ( 20   a ) can be separated from one another. 
     In the above embodiment, the separation mechanism  30  ( 30   a ) has been described as an example of a configuration in which the relative positions of the plurality of loudspeaker units are movable, but the present invention is not limited to thereto. For example, in the first embodiment, the separation mechanism  30  may be configured such that the loudspeaker unit  20 L and the loudspeaker unit  20 R are detachable from the upper plate ( 41 ,  51 ) and the lower plate ( 42 ,  52 ). Further, although the example in which the rack and pinion mechanism  32  and the guide rails ( 33 ,  35 ) are disposed on the back panel  31  has been described, the rack and pinion mechanism  32  and the guide rails ( 33 ,  35 ) may be disposed under the lower plates ( 42 ,  52 ). 
     Further, in this case, a rotation mechanism may be provided in the support member ( 34 ,  36 ) so that the direction of the loudspeaker unit  20  can be changed. Further, in the rotation mechanism, the angle may be fixed using a ratchet mechanism or the like. 
     Further, although the example in which the direction of the loudspeaker unit  20  is rotated in a horizontal direction (the X-axis direction) in the above-described rotation mechanism ( 40 ,  50 ) has been described, a structure in which the direction of the loudspeaker unit  20  is rotated in a vertical direction (Z-direction) may be adopted. For example, the rotation mechanism ( 40 ,  50 ) may include a side plate so that the loudspeaker unit  20  is supported by the side plate and the direction of the loudspeaker unit  20  can be changed in the vertical direction by the guide groove and the following pin. 
     Further, in the first embodiment, the separation mechanism  30  may not include the rotation mechanism ( 40 ,  50 ). 
     Further, in the first embodiment, the number of sets of the guide rails ( 33 ,  35 ) and the support members ( 34 ,  36 ) is not limited to two, and may be three or more. Further, the guide rails ( 33 ,  35 ) may be disposed in the vertical direction (the Z-axis direction) so that the loudspeaker unit  20  can be moved in the vertical direction. 
     Further, in the first embodiment, the example in which the guide rails ( 33 ,  35 ) are linear rails has been described, but the present invention is not limited thereto. For example, the guide rails ( 33 ,  35 ) may have a shape such that the support members ( 34 ,  36 ) are moved along other curved paths (a predetermined path) such as a fan shape (an arc shape). 
     In each of the above-described embodiments, the example in which the shape of the acoustic processing device  1  ( 1   a ) is a rectangular parallelepiped has been described, but the present invention is not limited thereto. For example, the acoustic processing device  1  ( 1   a ) may have a shape having a curved shape such as a fan shape. In such a case, the acoustic processing device  1  ( 1   a ) may include the guide rails ( 33 ,  35 ) that move the support members ( 34 ,  36 ) along the above-described curved path (the predetermined path). 
     Further, in each of the above embodiments, the acoustic processing of the acoustic processing unit  13  is not limited to the processing described in the embodiment, and other acoustic processing may be performed. 
     Further, although the example in which the amplification unit  22  is an amplifier with a DAC has been described in each of the above embodiments, the amplification unit  22  may be an amplifier that does not include a DAC. Further, in this case, a DAC function may be included in the acoustic processing unit  13  or the communication unit  21 . 
     The acoustic processing device  1  ( 1   a ) described above has a computer system included therein. Each processing step of the acoustic processing device  1  ( 1   a ) described above is stored in the form of a program in a computer-readable recording medium, and the process is performed by the computer reading and executing this program. Here, the computer-readable recording medium refers to a magnetic disk, a magneto-optical disc, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Further, a computer program thereof may be distributed to a computer through a communication line, and a computer receiving this distribution may execute the program. 
     While the embodiments of the invention have been described and illustrated above, the present invention is not limited to the above embodiments. Various modifications can be made without departing from the scope of the present invention.