I have a Denon 4802 receiver and a Denon 2900 that can play super audio cd's. When I put the disc in the DVD player recognizes it as a super audio cd and it plays but I don't hear any sound. When I switch the player from super audio to cd it plays it but but not stereo or multi. Any suggestions? This is my first attempt at listening to a super audio cd. Am I doing something wrong?