Mysterious Song's soundtrack was largely tracked by DarkDread himself, with a few modules borrowed from other sources. One of my current groups, Frozen Utopia, has produced a PC Engine conversion of Mysterious Song, with an entirely remastered score courtesy of Drake Woods. Some of the music in the released versions of Distant Promises was by Tarantula (used without permission of course hehe). I had intended to replace all of the borrowed tracks with original tracks by me, but we abandoned the project before I could do that. DarkDread gave me the rights to the game but I'm not sure if I will ever finish it or not. I also did a few tracks for my own QBRPG, Wrath Of Sona, though admittedly, not many people liked the ones I did.
I will upload all of the original tracks for Distant Promises if you'd like.
EDIT: I uploaded all the original tracks to my server:
http://www.nodtveidt.net/distant_promises_soundtrack.zipI was going to upload them here but figured I'd wait to see if that was feasible. Some of these tracks are unfinished, and some aren't really the quality of work that is expected around these parts...