Likely final release. It has 35 tracks, one per map and three for menu, intermission and intertext screens.
Drag and drop onto GZDoom to load the pk3.
Works with LZDoom as well, possibly works with ZDoom too since the file's architecture is so old.
Replaces all of the stock music in Doom 2 with new ambient music.
May not function well with mapsets/megawads which replace music. If this happens to you, open up Slade and delete the music files present in the WAD, then save a copy of the WAD so you can listen to custom music instead of whatever it has. Sorry, I don't know how to do this in a less crude way.