* Does the HDMI 1.4 spec allow ARC to pass 5.1 audio from a TV's ARC HDMI port to an ARC-enabled AVR?
* Does the HDMI 1.4 spec allow an ARC HDMI port to pass audio to another HDMI port on the same TV?
In poking around the Panasonic knowlegebase, I did find an interesting comment to the effect, "Since the TV is Stereo, any multichannel signals will be converted to Stereo before being passed upstream to the AVR." Hmmm, good one, I thought.
Anyway, I'll keep you posted. And remember, what I will post here is not opinion, its input directly from the two agencies mentioned above (if I get any).