Hi i have had a ux2 for for a month now and the problem started a few days ago. The thing is that when you are doing something or doing nothing in windows 7 i hear crackle sounds. It also happens when you are recording or when you test in windows playback devises. First i thought it might be the speakers but then it wasent the speakers. I plugged in headphones and the same problem was still there. So i new it might either be my pc or ux2 itself. I restored windows to its factory settings but the problem didnt go away. After that i got my fathers laptop and the same problem was still acuring. After that i tried my pc's own sound card and the problem was not there. So after all this testing i am 99% sure it must be the ux2 that has gone mad. Nothing wrong with speakers. Pc with its own sound card works fine. Ux2 on 2 computers dosent work properly.