If I have the CP72 and a receiver how would I hook everything up if I want to use my DAC from my receiver for regular audio and DAC from CP72 for dvd-audio? Assuming I want all my sound to be surround (5.1). I need optical cable from dvd to reciever to use its DAC for regular audio? How would I do it for DVD-Audio? Doesn't it have to be hooked up through analog to get surround sound? Thanks!