Er.. Chaos, what the hell was that post?
Lord Carlos, I can't find any reference to this kind of issue. Try updating your sound drivers first - be sure to select the correct ones otherwise you may very well lose sound altogether - and see if that makes any differences.
Next, try alternating your settings - for example I'd recommend turning off Reverb and playing and see if that makes any differecnes. However, apart from that I don't have a solution or any tips to offer.
Best of luck!