sound problem

hi, since day one i got demigod and through several patches i had this weird sound problem.

Every time i select a demigod and every time when i win a tournament, parts of the vocals are repeated and repeated again.

It goes on my nerv over time to the point i stoped playing, just now i checked for a new update of demigod but its all the same.

I got actual drivers for soundcard, video card etc. ...