szopaw: I'm not sure why it's happening, but the soundtrack isn't playing at all, no in the Main Menu, not in game (geoscape or tactical). Other sounds seem unaffected, including movies.

I have the Mutatis Mutandis mod installed, but I did have music at first, it dissapeared afterwards. I tried deleteing it as well, and it did not help with the issue.

The music really is a large part of the enjoyment of the game, and I'd really like it back.