^ I would say that just silences the music, that is the game still plays the music but you just can't (obviously) hear it.
I'm also curious about completely wiping out music to increase performance. I assume this would happen by renaming the music folder, as I didn't find anything helpful in the .ini files.
Tried disabling some stuff in the ini file, but this resulted in disabling all of the audio, not just the music. Tested it anyway and the game was running a hell of a lot smoother. Still, I like my SFX