I have an 8 channel HD on board realtek audio chip, and it went from working wonderfully to popping, and cracking. Well, I tried using a different media player, uninstalling the drivers, then reinstalling, and checked all my connections to make sure my high powered sound system wasn't starting to act up (that would have been really nice, as it cost me a mint). Well, I then started thinking "what have I changed recently? I had undervolted my CPU using RightMark, and stress tested my system for multiple hours without any errors or BSOD's, passing all Orthos test using blend mode. But, this was the first time I had actually used a media app since performing the under volt. Well, after changing my CPU back over to "high performance", and turning RightMark off I stopped getting those annoying pops and cracks. This kind of annoys me, as I was getting other wise good results from the undervolt, and everything else seemed stable. Also, while I've worked on, built and modded pc's for a good amount of time now, it still took me about an hour of trying different things before I remembered that my little adventure in undervolting might have been the culprit. I could see an inexperienced user pulling their hair out over something like this and even going so far as installing a sound card thinking their audio was corrupt, before they would ever think it had something to do with undervolting.