Immersive audio in a media playback system

1. A method to be performed by a network media system, the method comprising:

the network media system determining that a first zone in the network media system is playing back a first type of audio content, wherein the first zone comprises one or more first playback devices;

the network media system determining that a second zone in the network media system is not playing back audio content, wherein the second zone comprises a second playback device; and

while (i) the first zone is playing back the first type of audio content and (ii) the second zone is not playing back audio content, the network media system forming a temporarily playback configuration in which the first zone plays back primary audio content comprising full frequency range audio content and the second playback device of the second zone plays back auxiliary audio content comprising low frequency range audio content, wherein the first zone and the second zone are each configured to play back audio content individually before forming the temporarily playback configuration.

2. The method of claim 1 , further comprising:

the network media system detecting that the first zone is no longer playing back the first type of audio content, and

in response to detecting that the first zone is no longer playing back the first type of audio content, the network media system forming the second playback device into the second zone, wherein forming the second playback device into the second zone de-forms the temporarily playback configuration.

3. The method of claim 2 , wherein detecting that the first zone is no longer playing back the first type of audio content comprises detecting that the first zone is instructed to play back a second type of content, and wherein the second type of content is an audio track streamed via a network interface.

4. The method of claim 1 , further comprising:

the network media system detecting that the second zone is instructed to play back audio content, and

in response to detecting that the first zone is no longer playing back the first type of audio content, the network media system forming the second playback device into the second zone, wherein forming the second playback device into the second zone de-forms the temporarily playback configuration.

5. The method of claim 1 , wherein the first type of audio content is an audio track of a video, and wherein determining that the first zone in the network media system is playing back the first type of audio content comprises determining that the first zone is receiving the audio track of the video via (a) an output port of a display device or (b) an output port of a media player device that outputs audio and video.

6. The method of claim 1 , wherein the second playback device is a subwoofer, and wherein the second zone consists of the subwoofer and one or more full-range playback devices, and wherein forming the temporary playback configuration comprises temporarily forming a bonded zone that includes the one or more playback devices of the first zone and the subwoofer of the second zone, wherein the second zone consists of the one or more full-range playback devices while the temporary playback configuration is formed.

7. The method of claim 1 , wherein the second zone consists of a subwoofer and one or more full-range playback devices, wherein the first type of audio content is a multi-channel audio track, and wherein the full frequency range audio content comprises a center channel audio track and wherein the auxiliary audio content comprises one or more surround audio tracks.

8. The method of claim 1 , further comprising:

receiving, via a network interface from a control device, instructions designating the second zone as part of the temporarily playback configuration.

9. A network media system comprising:

one or more processors; and

data storage storing instructions executable by the one or more processors to cause the network media system to perform functions comprising:

determining that a first zone in the network media system is playing back a first type of audio content, wherein the first zone comprises one or more first playback devices;

determining that a second zone in the network media system is not playing back audio content, wherein the second zone comprises a second playback device; and

while (i) the first zone is playing back the first type of audio content and (ii) the second zone is not playing back audio content, forming a temporarily playback configuration in which the first zone plays back primary audio content comprising full frequency range audio content and the second playback device of the second zone plays back auxiliary audio content comprising low frequency range audio content, wherein the first zone and the second zone are each configured to play back audio content individually before forming the temporarily playback configuration.

10. The network media system of claim 9 , wherein the functions further comprise:

detecting that the first zone is no longer playing back the first type of audio content, and

in response to detecting that the first zone is no longer playing back the first type of audio content, forming the second playback device into the second zone, wherein forming the second playback device into the second zone de-forms the temporarily playback configuration.

11. The network media system of claim 10 , wherein detecting that the first zone is no longer playing back the first type of audio content comprises detecting that the first zone is instructed to play back a second type of content, and wherein the second type of content is an audio track streamed via a network interface.

12. The network media system of claim 9 , wherein the functions further comprise:

detecting that the second zone is instructed to play back audio content, and

in response to detecting that the first zone is no longer playing back the first type of audio content, forming the second playback device into the second zone, wherein forming the second playback device into the second zone de-forms the temporarily playback configuration.

13. The network media system of claim 9 , wherein the first type of audio content is an audio track of a video, and wherein determining that the first zone in the network media system is playing back the first type of audio content comprises determining that the first zone is receiving the audio track of the video via (a) an output port of a display device or (b) an output port of a media player device that outputs audio and video.

14. The network media system of claim 9 , wherein the second playback device is a subwoofer, and wherein the second zone consists of the subwoofer and one or more full-range playback devices, and wherein forming the temporary playback configuration comprises temporarily forming a bonded zone that includes the one or more playback devices of the first zone and the subwoofer of the second zone, wherein the second zone consists of the one or more full-range playback devices while the temporary playback configuration is formed.

15. The network media system of claim 9 , wherein the second zone consists of a subwoofer and one or more full-range playback devices, wherein the first type of audio content is a multi-channel audio track, and wherein the full frequency range audio content comprises a center channel audio track and wherein the auxiliary audio content comprises one or more surround audio tracks.

16. The network media system of claim 9 , wherein the functions further comprise:

receiving, via a network interface from a control device, instructions designating the second zone as part of the temporarily playback configuration.

17. A tangible, non-transitory computer-readable medium storing instructions that when executed by at least one processor cause a network media system to perform functions comprising:

determining that a first zone in the network media system is playing back a first type of audio content, wherein the first zone comprises one or more first playback devices;

determining that a second zone in the network media system is not playing back audio content, wherein the second zone comprises a second playback device; and

while (i) the first zone is playing back the first type of audio content and (ii) the second zone is not playing back audio content, forming a temporarily playback configuration in which the first zone plays back primary audio content comprising full frequency range audio content and the second playback device of the second zone plays back auxiliary audio content comprising low frequency range audio content, wherein the first zone and the second zone are each configured to play back audio content individually before forming the temporarily playback configuration.

18. The tangible, non-transitory computer-readable medium of claim 17 , wherein the functions further comprise:

detecting that the first zone is no longer playing back the first type of audio content, and

in response to detecting that the first zone is no longer playing back the first type of audio content, forming the second playback device into the second zone, wherein forming the second playback device into the second zone de-forms the temporarily playback configuration.

19. The tangible, non-transitory computer-readable medium of claim 18 , wherein detecting that the first zone is no longer playing back the first type of audio content comprises detecting that the first zone is instructed to play back a second type of content, and wherein the second type of content is an audio track streamed via a network interface.

20. The tangible, non-transitory computer-readable medium of claim 17 , wherein the functions further comprise:

detecting that the second zone is instructed to play back audio content, and

in response to detecting that the first zone is no longer playing back the first type of audio content, forming the second playback device into the second zone, wherein forming the second playback device into the second zone de-forms the temporarily playback configuration.