I am trying to hook up my system for the optimum sound. I have a widescreen TV, Apple TV (latest version), Sony Model DVP-NS45P DVD player and CD changer. The TV, AppleTV and CD have optival cable outputs. The DVD has a Digital Coax. THe Receiver accepts 1 Digital COax and 2 optical imputs. I seem to be ablt to get the DVD and CD player to succesfully input digitally, but not so with either TV signal. I know there is a selection to configure the Digital inputs and I think I have tried about every combo. I also notice that the DVD digital workds, but the "DVD Multi" selection provides no sound. Not sure if that is due to the Disc I was playing or the lack of capabiity on the part of the DVD player. I can hook the TV or Apple TV (with a Digital to analog converter) into the analog ports on the receiver and use the effects, but I get a significant buzz. Any ideas?