Have a Roamio Plus connected to Marantz SR7008 receiver via HDMI. When I have the TiVO Dolby in use I get an annoying mechanical click in the receiver whenever I skip forward or backward, and other times like when some commercials play or I change channels. I presume this is when there is an interruption in the Dolby audio. To get rid of the click, I can set the Roamio for "PCM only (no Dolby)" in the audio settings. The Marantz also has a decode option in the Inputs menu for "Auto", "DTS" and "PCM" that I just left on Auto. Question: Isn't "Use Dolby Audio" better than "PCM only (no Dolby)"? If Dolby is better, is there any way to "Use Dolby Audio" instead of "PCM only (no Dolby)" on the Roamio and not have the mechanical click in the receiver all the time? Question: So what is the real difference between "Use Dolby Audio" and "PCM"? The receiver says, "Dolby D" on the display with the Tivo set to "Use Dolby Audio" and "PLIIx" with PCM. Both have what looks like a Dolby icon on the receiver display.