I love the Music of Last Rite.

Is there a way to get the OST music from the Last Rite CD in game folder?
The files are there but it is an unknown format .DSF .

Anyone tried to export these music files and how? Thanks in advance.

I've used a program called vgmstream for this purpose. You can find it at github.com/vgmstream/.
There's a plugin for Foobar2000 for easy playback and also a commandline utility for converting to .wav.
Hope this helps!