Patent ID: 11909365
Assignee: SONOS, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 10:
11. Tangible, non-transitory computer-readable media comprising program instructions executable by one or more processors such that a first playback device is configured to perform functions comprising:
while a playback volume of the first playback device is at a first volume level and the first playback device is not configured to play audio content as part of any playback group, (i) setting a state variable corresponding to the playback volume to a first value corresponding to the first volume level, and (ii) transmitting one or more messages comprising the first value corresponding to the first volume level to at least one computing device;
after receiving a command for the first playback device to join a playback group comprising at least a second playback device, (i) joining the playback group with at least the second playback device, (ii) changing the playback volume from the first volume level to a second volume level, wherein the second volume level is a volume level for the playback group, (iii) changing the state variable corresponding to the playback volume to a second value corresponding to the second volume level, and (iv) transmitting one or more messages comprising the second value corresponding to the second volume level to the at least one computing device; and
after receiving a volume adjustment command for the playback group while the first playback device is in the playback group, (i) changing the playback volume from the second volume level to a third volume level, wherein the third volume level is a volume level for the playback group, (ii) changing the state variable corresponding to the playback volume to a third value corresponding to the third volume level, and (iii) transmitting one or more messages comprising the third value corresponding to the third volume level to the at least one computing device.