Command & Conquer 3.... Problem

Whenever I go into the tutorial, the main voice instructing has a chipmunk voice. It is sped up really fast, and I cant understand it at all. The music is fine, the sound fx seem fine, everything but the voices. My troops voices as well. I uninstalled and reinstalled the game several times, to the same problem. Has anyone else had this problem? I also unchecked "highquality audio" to try and solve the problem but no luck.

Any suggestions?

On-board sound or sound card?