Hi, I only get this - a stutter in the audio - with .bik video files ( in-game cutscenes). If I play them using the Rad Video tool I can get them to play if I tweek the advanced audio setting to "use wave out".
I know alot of others have had this problem, but I have not been able to find any solution anywhere.
This is a pain as most games use these for their cutscenes.
All drivers are up to date as of Jan. 19, 2011.
Windows 7 64 bit Home Edition
GTX 280 1g
Creative Xi-Fi extreme audio
Core 2 duo - 3.45ghz