cb4800

Hello. I am having really bad poping and hissing sounds when playing video files in windows mediaplayer. I have a soundblaster live value card and 4pt cambridge digital speakers, and an ATI all-inwonder 128. All other audio is fine. Why would this suddenly occur? I don't know if it is the sound or video card, or windows media player causing the problem. I have the newest drivers for both cards and am running wmp v6.4.

Thanks for any help given