Crackling sound on Win7 64 bit

[PsiloX]

Hey guys nice to be on the forums.I had a question.Im going to play dantes inferno but im getting crackling sound in game and the actual gameplay sounds seem muffled.This only happens when playing.Cut scenes and everything else is just fine til i start to play in the level. Ive tried various things like frame skipping and changing various options while the game was running and still no go.I also downloaded and installed the Atrac3+ but it doesnt do anything.Im running a phenom ii x6 1100t 16 gigs of ram and 2 hd6950's and a 7.1 audio card so I know its not the computer. Any suggestions? Maybe its just the game Im not sure. Its the only psp game I have