I remember reading about the specs for dvd-audio. If I remember correctly, it can have separate high-res stereo and 5.1 tracks. I also remember reading that it can downmix the 5.1 to stereo, eliminating the need for a separate stereo track. I would rather have the original stereo track in high-res, not the 5.1 mix combined for stereo. Does anyone know if there is a way to tell on the packaging if a disc has a separate stereo track?