If it's a constant choppiness when you're in-game it sounds to me like an issue with cleanly processing the sound from the game *and* teamspeak.
I'd start by updating your sound card drivers (yes, even if you only checked yesterday - you never know, might find something new.

)
The other item to check would be to make sure DirectX is up-to-date and not missing any files. For that, just re-run the DirectX installer from
www.microsoft.com/directx.
While you're at it, update your video drivers as well. Anything that can make your system at large run smoother might sort out this problem as well.