Seabear, i have hooked up my dvda to my receiver using just 2 analog inputs. You still get the high resolution format but obviously only in 2 channels. However, since the dvda format was designed for 5.1 speaker arrangement, i think you would be missing alot.
There was little if any sonic difference in playing the high resolution vs regular digital stereo discs this way.

"Those who preach the myths of audio are ignorant of truth."