AVR 1919 sound drop-out
I'm having an odd issue with my 1909 that I have not been able to figure out. My setup is Cable Box (xfinity, Motorola RNG200N) - HDMI - AVR1909 - HDMI - Panasonic Plasma TV (as a monitor).
There are a few channels where this happens, mostly the legacy network channels, NBC, etc. I happened last night during the Golden Globes. The sound is fine and regular, it's showing that it's getting Dolby Digital in, and it's sending 5.1 to my speakers. Then, when there is a change, like from the announcement portion of the Golden Globes, to a part where they are doing some sort of musical skit, or showing clips from a movie, the sound level drops off a cliff, and if I turn the volume way up, I can hear it only coming from the surround speakers. If I switch the output to Stereo, the sound comes back, but of course only through the L+R front speakers. It happens for many commercials as well.
I have tried changing configurations all over the place turning compression off and on, trying to adjust settings on the cable box, etc. My running theory is that the 1909 is missing some modern codec that is necessary to handle the new data stream coming in from xFinity. One thing I haven't done is with the Audyssey EQ / Dynamic volume settings, maybe it's a feature that's meant to mute commercials?