I have a new ATV2 and am directly connecting to my Denon receiver using an optical connection. With the ATV2 "Dolby Digital" setting to 'On', I can get Dolby Digital (5.1) from movies on iTunes, but I'm wondering if the Denon unit is capable of automatically detecting/switching between two-channel stereo and 5.1, for example, if I wanted to also stream music. If so, I'm struggling to find the setting on the Denon. Setting the ATV2 to 'Auto' does not seem to force the Denon unit to decide. Is the Denon known to be limited in this regard?
Thanks in advance.