Originally Posted by av addiction if you your TV is the source of the media
as with over-the-air broadcasts or other streaming media available on many of today's TV's, Without ARC you'd need to run a separate audio cable out of the TV back to the receiver in order to play it through your audio system. With ARC you don't need to do this, the signal can travel back through the same cable.
In this case his problem didn't have to do with ARC.
Please read careful before you jump to conclusion Mr smart. And your answers didn't not address his problems.
Actually I addressed his concern, you did not. His concern was regarding why Blu-ray was only passing 2ch PCM via ARC, not from the onboard source. Your explanation stated ARC was only for onboard sources, without explaining why his Blu-ray was only outputting PCM. Your explanation also made it sound like ARC is only for onboard sources and nothing else, whereas ARC works for onboard sources and all devices plugged into the tv via HDMI and analog.
It looks like he has the bluray player plugged directly into the tv and passed to the AVR via ARC, which is limited in audio formats. He should plug the BD player directly into the receiver instead of the tv.