My speakers when not playing sounds or music make buzzing noises when i move the mouse around and when the computer is "thinking".
I have used different speakers so its not the speakers problem. When i go to connect the speakers to the jack at the back of the computer and just touch the plug with the jack it makes buzzing as if its "static-ty"
This happend after i installed XP home on to the computer (currently running SP2, on a P3 800, 144ram, 64mb vram) it may be my sound card that is stock and built into the motherboard.