Thanks for the suggestions, guys.
Tricky, your suggestion didn't work (I just got an error message saying it couldn't play the file). However, I messed around with the audio settings, and switching 3D Audio thingy from Software Mode to Hardware Accelerated fixed it.
Yay, I can finally play without losing my patience after 20 minutes
edit: Seems it was actually even simpler. I turned off the music in game. I feel rather stupid
