If you have HDMI connected to a Zone 2 TV:
When setting the Zone 2 Source to any source that is different from the main zone, the ‘raw’ audio and video will be sent into Zone 2, as output by the source. If the selected Zone 2 Source has a multi-channel audio signal (eg. BD player/5.1 satellite signal) the Zone 2 TV must be able to play/decode multi-channel HDMI audio, otherwise, no sound will be heard in this case.
We recommend that the Zone 2 TV is able to play/decode multi-channel HDMI audio. If not, then for multi-channel audio sources, only the picture will be displayed in Zone 2 (unless using the Follow Main feature).
If you have Speaker/Zone 2 Pre-out connection to Zone 2:
When setting the Zone 2 Source to any source that is different from the main zone, only sources with a 2CH PCM (stereo) audio signal are output to Zone 2.
If the selected Zone 2 Source has a multi-channel audio signal (eg. BD player/5.1 satellite signal) this cannot be output to Zone 2 if the Follow Main feature is not being used."