I had similar problems before although the sound became pretty much alien speech instead of the beautiful vocals I was prepared to hear. It was a windows-side driver error. Not entirely sure what good ways to perma fix it since i dont remember what I did to mine, though it works well now.
I listen to music without vocals so that's what I was describing above. People do sound like robots when this happens.
It may be driver related, as I had usb issues in the past.
Edited by shrkz - 8/31/13 at 3:23pm