Sound problem in Quicktime

The problem is that there is some sort of disturbance of the sound, electrical of some kind, can't really describe it. You can hear what is said and so without a problem, but the mis-sound is there, going up and down with the volume and bass. It's the same for all files I play in the program.

There's no problem with the sound in anyway in all my other programs. I've tried to re-install the program, no luck, the same goes for updates.

OS: Windows XP
Quicktime: Version 6
Sound card: Soundblaster Live! Value