Hi everyone. New member here! I'll save you the loooong story, but I'm trying to troubleshoot some issues between by Samsung KS8000 TV, a Panasonic SA-BT200 5.1 surround system, and two games consoles (PS4 Pro & XBox One X). In doing so I've done a lot of reading online and I'd just like to clarify my understanding of a few features please. ARC - Audio Return Channel As I understand this, it's a method for a TV to transmit audio via HDMI to a receiver. That's likely very blunt, but correct, yes? Am I right in thinking in that case that there needs to be an ARC enabled HDMI port on either end of the signal chain - i.e. output on the TV and input on an audio receiver? PCM - pulse code modulation This is an output format which is uncompressed, as opposed to bitstream which can carry (for example) a compressed Dolby Digital 5.1 signal. PCM is higher quality since it is not compressed (in comparison to bitsream carrying a compressed audio signal at least). PCM requires full transit via HDMI, from source to receiver - mediums such as optical are not up to the task of carrying 5.1 or 7.1 audio in PCM format and will limit the signal down to 2-channel stereo. Based on the above being correct, if I have a games console which can output 5.1 audio in PCM format over HDMI to a TV and a TV which can catch that PCM signal and then pass the same PCM signal onward to a receiver via their respective ARC HDMI ports, then the receiver should playback the full uncompressed 5.1 audio signal? For simple clarity, this is all due to my SA-BT200 surround system now being the weak link in the chain, having no ARC support and only two optical inputs to share between 3 devices (TV and two consoles). I'm looking at my upgrade options and if I've understood the above terms and capabilities correctly, then I think I know what I need to be aiming for as a replacement. Cheers!