When I play *any* sound on Fedora 8 through pulse (system sounds, audacity, etc) before the sound starts, and after it ends I hear a snap sound that sound just like Rice Krispies cereal

I have looked everywhere expecting others to have similar experiences but have found nothing. The sound is not loud, it just seems annoying and I am hoping someone has suggestions to limit the otherwise perfect experience with PA.
I have tried setting different levels for the audio devices in pulse, but the volume of the crack sound never really changes. Any suggestions?
Thanks,
Chris