Is it possible to remove the monster music?

[Yuhaney]

Delete the music file you want to remove from the game.
Add your own music file (has to be same file type, I have a feeling they are .ogg files) and rename it to be the same as the one you just removed.

I think that should do the trick.
However, I don't have Amnesia installed so I can't look which folder they're located at.