I hope you have apple care, cause i had the exact same problem your post is describing. Those audio samples brought chills down my spine just remembering!!! Basically this is what happens when your logic board is about to fail i guess. The only way to fix it is to get a new one. So if you're under a year with your warranty, or if you got the apple care, you'll be fine. Otherwise, you'll have to buy a whole new logic board which is like a grand!!! Luckily, I was smart and bought the apple care. Never know when that will come in handy. Hope that helps. CHEERS!