This one is a little live performance or trololo:
And this is not "trololo" but the "idea" is same I think :D :
http://www.youtube.com/watch?v=BPtkRnJ2vss&feature=related
I think you can activate the game with your serial. Of course you lost 1 of 8 activations. Please read the manual or game's FAQ before doing anything with the game.
I think problem is soundcard. Could you update your soundcard driver. It seems like samplerate switching problem or bad data on soundfile.
BTW I believe RME's are best sound cards for recording but not for gaming.