I just got a dish 811 hd receiver, and i hooked up the audio to my denon 4800 with a optical cable. I went in to the set up menu in the denon and selected the optical setting for the satellite receiver. My ? is, what mode do i set the denon in when watch satellite , pro logic, or 7 channel stereo,ect. How do you tell if you are getting some form of 5.1 stuff ,I cant seem to be able to tell much of a differents from one setting to the other, Im useing the TV/DBS input on the back of the denon. It all sounds pretty good but i want to be sure im getting the best sound i can. thanks