I'm running Windows 7 and somewhat frequently I'll run into an issue where whenever sound is played it will be accompanied with some irritating crackling which varies in severity. The problem used to just fix itself if I muted the sound for a while, but that temporary fix seems to have stopped working. I have a Creative SB X-FI sound card and my sound drivers are NVIDIA High Definition Audio and Creative X-Fi Audio Processor (WDM). They're both updated to the latest version if that matters. Does anyone have any idea what the cause of my problem is and/or how to fix it?