It seems that when running Windows XP via Bootcamp on a Macbook Pro there's problems with the sound drivers supplied by Apple. I discovered this when playing Battle for Middleearth 2 on a particularly boring train journey from London to Leeds last week. On removing my earphones I discovered that sound was still emanating from the built in speakers. To my horror i'd been playing the game with everyone in my immediate vicinity able to hear what was going on. I know i'd have been annoyed had i been on the receiving end. How embarrassing!
Macbook Pro Sound Issues (windows xp)