This happens to me too. When I am watching on demand or change channels I get a high pitched chirp when the audio signal changes. It drives me nuts. And I can't get it to go away no matter what I try. Is my STB defective? Edit: I have 3 Pace X1 boxes no DVR. I don't get drop out just the chirping. I have a pioneer vsx-324-k receiver going to vizio e480i-b2 If I set the stb to stereo instead of surround the chirping doesn't happen but I don't get surround so that's not really an option.
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