DiabloFans

Official D1 music does exist in stereo.
Unfortunately, the best I was able to find was .mp3 192kBit/s quality =(
I'm working with several composers, creating similar music, and it will be in excellent quality (lossless even).

Here's one short sample from one our numerous 'Catacombs' interpretations for The Hell mod:
http://thehellmod.ucoz.ru/Downloads/Music/Exp/catacombs9.mp3

By the way, if there are any composers around, who would like to invest in this, I'd be happy to work with you.