Windows Media Player making popping noise

My WMP makes muffled popping noises while playing audio. I've looked through all troubleshooting pages but none of them match the problem I'm having. I've found remedies for clicking noises, scratching noises and no audio at all but nothing describes the muffled popping noise that I get. The noise is constant and there are about 2 pops per second. I did the sound test and all that stuff but it didn't do anything. Is there a comprehensive troubleshooting page that I can go to that can maybe provide samples of the noises I'm getting so I can match it and find the correct solution?