@Dinierto Did you get an answer on this? I have the same problem.

I can't even get sound/cdtracks to get picked up by Darkplaces. Which folder did you put that within - mine is sitting in /home/pi/RetroPie/roms/ports/quake/id1/sound/cdtracks - but I've tried /home/pi/RetroPie/roms/ports/quake/id1/id1/sound/cdtracks and /home/pi/RetroPie/roms/ports/quake/sound/cdtracks also

Did you have to do anything else for that to work?

Edit: I've got this working now, I have .ogg files and .MP3 files in home/pi/RetroPie/roms/ports/quake/id1/sound/cdtracks and they are picked up in Darkplaces.

I've also got lr-tyrquake working, the same files in home/pi/RetroPie/roms/ports/quake/id1/music

I don't know if the original .ogg files I had were bad, or if having the .MP3s in there makes a difference, but it is working whatever the problem was.

Note that you'll be needing a 'registered' (i.e. full) version of Quake (1) to play it, the demo won't cut it.

Bingo :) Thanks!!

Facepalm @ self for overloking that option... well, now all is good.

Perfect!