I hate to ask this because I'm usually better at figuring this stuff out, but I'm going to anyway... I just got a Denon 1600 DVD player that is DVD-A compatible and I have it hooked up through my Onkyo 898 receiver. For video, I'm running an optical audio cable (the only digital output on the 1600). Is this sufficient to play DVD-Audio as well? Or do I need to use the 6-channel analog output on the DVD player? If so, how do I tell my receiver to "look" to its 6 channel input? Both the 1600 and 898's instruction manuals are maddeningly obtuse on the subject of DVD-A. As an aside, the only DVD-A title I have is the Band's "Music from Big Pink," which, while an amazing record, is a little old for me to really tell if I'm hearing high-res or just Dolby Digital. Any help is greatly appreciated!