All, I have a few year old DirecTV Tivo HD DVR plumbed to a Denon 5.1 surround amp. Everything has been running fine until recently... I am now getting "pops" and "chirps" in my speakers. It randomly happens in all 5 channels, but never at the same time. And sometimes its bad...loud pops and chirps every2-4 seconds. The effect is not present when running from my blue ray player or PS3...even when streaming music. My recent discovery is this noise goes away when I turn off Dolby in the DVR, but when I do this, the Denon dumbs down the audio quality substantially. Ive contacted DirecTV and they had me bypass the amp and use the straight audio through the TV speakers, and the problem goes away, so they are deeming the DVR as good. Anybody have any information/advise/experience with my issue? Oh, and sat strength is excellent...99-100 on all transponders.