it seems that this game has a lot of issues. im having this problem as well. :(

As weird as it may sound, it is the certain sound cards (not only audigy i´m afraid), funny how that works, sound affects video.

Aniway, creative (audigy, live, pro, xfi) have lunched a new driver for their cards to fix this issue, so i would suggest for creative sound card owners to download it.

No idea about the rest, sorry.