In one example, data and information (e.g., such as a state variable) may be communicated between a controller device and other devices via the network interface 430. For instance, playback zone and zone group configurations in the MPS 100 may be received by a controller device from a playback device, a network microphone device, or another network device, or transmitted by the controller device to another playback device or network device via the network interface 406. In some cases, the other network device may be another controller device.
Playback device control commands such as volume control and audio playback control may also be communicated from a controller device to a playback device via the network interface 430. As suggested above, changes to configurations of the MPS 100 may also be performed by a user using the controller device. The configuration changes may include adding/removing one or more playback devices to/from a zone, adding/removing one or more zones to/from a zone group, forming a bonded or merged player, separating one or more playback devices from a bonded or merged player, among others.