I have made it through the hook up process (about a week ago) and I am now completely lost. I have read the manual front to back and can't figure the problem out. I can hear sound out of all the channels when I perform the speaker test and set up, however, I have no sound when I attempt to play a CD or DVD. I have the Denon 1910 DVD player and my HD Cable box correctly connected to the 2805 via digital coaxial connections. Is there some set up feature I'm missing either throught the receiver or DVD player. Also, what is the abbreviation I should be using in the receiver set up for the HD cable box connection to the coaxial input?