I thought I'd post here to try and make someone in the relic team aware: There's no music in multiplayer.
Now, I know that this game has a soundtrack including a theme for each race, and I'm surprised that they seem to have forgotten entirely about adding any to MP.
Is this a bug that simply means it's disabled? Was it an oversight? I can't imagine it was done on purpose! Music adds so mutch atmosphere to games that it's pretty important. I'm hoping we can get some added in with a later patch.