I've been using two Apple TV 2's for quite a while and just purchased an Apple TV 3. I immediately noticed some audio pops that I never heard before on the Apple TV 2. These occur when starting to play video files (but not music): there is an initial pop as the movie is spooling followed by a second louder one just prior to the video starting. Additionally, there is another pop when I leave the movie and go back to the menu. It will go through the same set of pops if I resume from the middle of a movie. I called Apple tech support, and they said it should be replaced, so I did that. The replacement unit behaves identically, so it appears that this is something inherent in the Apple TV 3 that is not in the Apple TV 2. I haven't found any other references to anything like this, so it also appears to be 1. Switched from HDMI audio in to optical in on my receiver (Denon AVR-890), no difference, it still pops. 2. Updated to latest software, no difference. 3. Swap out the Apple TV 3 with an Apple TV 2 using the same cables, there are no pops. 4. Route HDMI directly to TV, optical audio to receiver, there are no pops. So there appears to be some kind of issue with the HDMI in the Apple TV 3, maybe in combination with my receiver. Number 4 is not a solution I can use because I need to route video through the receiver to get volume info. This is not a great problem, but it is enough of an irritant that I'd like to eliminate it. The questions that I have are a) is there anything else I could try, and b) is this a problem unique to me. Thanks.