US Patent 9232277 Associating playback devices with playback queues

An example method includes receiving a first command by a device to group a first playback device with at least a second playback device for synchronous audio playback. In the example method, the group is associated with a first playback queue comprising a list of one or more items for playback by the group. The example method includes, for as long as the playback device is in the group, receiving a second command by the device to remove the first playback device from the group, wherein the first playback device is ungrouped and automatically associated with a second playback queue. In the example method, the second playback queue comprises a list of one or more items for playback by the playback device.