I just bought a YAMAHA HTR 5835 and connected it to my PM G5's optical output. Yet when I go on Audio MIDI setup, I can only get stereo(2 CH). I WANT 5.1! Can the PM G5 even output a 5.1 signal from DVD and stuff? Oh and if anyone can help me configure this thing(HTR 5835) to get Dolby Digital 5.1, please do.