GOG provides a limited soundtrack (just 15 tracks), while some other (not to be named) DRMed services provide 24 track OST :(

Did anyone manage to extract the music? I used quickbms script for Unreal Engine, and it produces a few *.bank files which were made by FMOD. I found one other sample script which extracted *.fsb from those *.bank, but after that FSB Vorbis extractor couldn't read anything from the resulting *.fsb.

I'll look more into it.