Im hooking up my denon 1600 dvd player to the 3803 reciever. My question, in order to get all 5.1 channels for a dvd audio, do I have to hook up all the analog out channels, or just the left and the right? Will the reciever out put to all the channels from there? I realize that for a dvd I use the optical out put, however with a audio cd I was told that I must go analog. thanks for your help.