Method and apparatus for providing synchrony group status information

1. A method performed by an audio processing device, the method comprising:

receiving audio via a network interface from a wide area network (WAN) location;

receiving, via the network interface from a controller over a local area network (LAN), a command to form a synchrony group with at least one additional audio processing device; and

outputting the received audio to a playback device;

wherein after receipt of the command from the controller over the LAN, the audio processing device (i) forms the synchrony group with the at least one additional audio processing device (a) transmits status information pertaining to a status of the synchrony group to the controller over the LAN, wherein the status information indicates that the audio processing device is a member of the synchrony group with the at least one additional audio processing device, (b) streams the received audio via the network interface over the LAN to the at least one additional audio processing device, (c) transmits clock information of the audio processing device to the at least one additional audio processing device, and (d) outputs the received audio based on the clock information in synchrony with the at least one additional audio processing device, wherein the audio processing device and the at least one additional audio processing device remain independently clocked during output of the received audio in synchrony.

2. The method of claim 1 , wherein the status information further comprises an identification of the members of the synchrony group.

3. The method of claim 2 , wherein the status information further comprises an identification of a master member of the synchrony group.

4. The method of claim 1 , wherein the status information further comprises an identification of audio currently being played by the members of the synchrony group.

5. An audio processing device comprising:

one or more processors; and

tangible, non-transitory computer-readable memory with instructions encoded thereon, wherein the instructions, when executed by the one or more processors, cause the audio processing device to perform a method comprising: receiving audio via a network interface from a wide area network (WAN) location;

outputting the received audio;

receiving, via the network interface from a controller over a local area network (LAN), a command to form a synchrony group with at least one additional audio processing device; and

wherein after receipt of the command, the audio processing device (i) forms the synchrony group and (ii) after the audio processing device forms the synchrony group with the at least one additional audio processing device, the audio processing device, (a) transmits status information pertaining to a status of the synchrony group over the LAN to the controller, wherein the status information indicates that the audio processing device is a member of the synchrony group with the at least one additional audio processing device, (b) streams the received audio via the network interface over the LAN to the at least one additional audio processing device, (c) transmits clock information of the audio processing device to the at least one additional audio processing device, and (d) outputs the received audio based on the clock information in synchrony with the at least one additional audio processing device, wherein the audio processing device and the at least one additional audio processing device remain independently clocked during output of the received audio in synchrony.

6. The audio processing device of claim 5 , wherein the status information further comprises an identification of the members of the synchrony group.

7. The audio processing device of claim 6 , wherein the status information further comprises an identification of the audio processing device as a master member of the synchrony group.

8. The audio processing device of claim 5 , wherein the status information further comprises an identification of audio currently being played by the members of the synchrony group.

9. The audio processing device of claim 5 , wherein the status information further comprises an identification of audio scheduled to be played by the members of the synchrony group.

10. The audio processing device of claim 5 , wherein the method further comprises:

transmitting status information via the network interface to multiple additional controllers, wherein none of the additional controllers are zone players and none of the additional controllers are members of the synchrony group.

11. The audio processing device of claim 5 , wherein the audio processing device further comprises one or more speakers, and wherein outputting the received audio comprises playing the received audio out of the one or more speakers.

12. The audio processing device of claim 5 , wherein streaming the received audio via the network interface over the LAN to the at least one additional audio processing device comprises sending the received audio to a multicast network address associated with the synchrony group.

13. The audio processing device of claim 5 , wherein streaming the received audio via the network interface over the LAN to the at least one additional audio processing device comprises sending a plurality of frames to the at least one additional audio processing device, wherein an individual frame comprises at least a portion of the received audio and playback timing information for the at least a portion of the received audio.

14. The audio processing device of claim 5 , wherein transmitting the clock information of the audio processing device to the at least one additional audio processing device comprises sending the clock information of the audio processing device to a unicast network address associated with the at least one additional audio processing device.

15. A tangible, non-transitory computer-readable memory having instructions stored thereon that when executed cause an audio processing device to:

receive audio via a network interface from a wide area network (WAN) location;

receive, via the network interface from a controller over a local area network (LAN), a command to form a synchrony group with at least one additional audio processing device;

wherein after receipt of the command, the audio processing device (i) forms the synchrony group with the at least one additional audio processing device and (ii) after the audio processing device forms the synchrony group with the at least one additional audio processing device, the audio processing device (a) transmits status information pertaining to a status of the synchrony group over the LAN to the controller, wherein the status information indicates that the audio processing device is a member of the synchrony group with the at least one additional audio processing device, (b) streams the received audio via the network interface over the LAN to the at least one additional audio processing device, (c) transmits clock information of the audio processing device to the at least one additional audio processing device, and (d) outputs the received audio based on the clock information in synchrony with the at least one additional audio processing device, wherein the audio processing device and the at least one additional audio processing device remain independently clocked during output of the received audio in synchrony.

16. The computer-readable memory of claim 15 , wherein the status information further comprises an identification of the members of the synchrony group.

17. The computer-readable memory of claim 16 , wherein the status information further comprises an identification of a master member of the synchrony group.

18. The computer-readable memory of claim 16 , wherein the status information further comprises an identification of one or more slave members of the synchrony group.

19. The computer-readable memory of claim 15 , wherein the status information further comprises an identification of audio currently being played by the members of the synchrony group.

20. The computer-readable memory of claim 15 , wherein the status information further comprises an identification of audio scheduled to be played by the members of the synchrony group.

21. The computer-readable memory of claim 15 , wherein the audio processing device further comprises one or more speakers, and wherein outputting the received audio comprises playing the received audio out of the one or more speakers.

22. The computer-readable memory of claim 15 , wherein streaming the received audio via the network interface over the LAN to the at least one additional audio processing device comprises sending the audio to a multicast network address associated with the synchrony group.

23. The computer-readable memory of claim 15 , wherein streaming the received audio via the network interface over the LAN to the at least one additional audio processing device comprises sending a plurality of frames to the at least one additional audio processing device, wherein an individual frame comprises at least a portion of the received audio and playback timing information for the at least a portion of the received audio.

24. The computer-readable memory of claim 15 , wherein transmitting the clock information of the audio processing device to the at least one additional audio processing device comprises sending the clock information of the audio processing device to a unicast network address associated with the at least one additional audio processing device.