When I first got the game I was running Vista and the game ran just fine except I had to set the graphics low so I know its not my system, but I resently went back to XP because Vista is just too resource hungry. Now the sound is constantly stuttering/echoing. As a test I put Vista back on and it ran fine again. All my other games have no sound issues and all my drivers are up to date. Im running on a soundblaster audigy, Any ideas?