At my peril I shall butt in. The point of the device is surely to avoid passing the signal through the tv as the tv may not have eARC. So the composite signal is generated by the blu-ray player and passed to Arcana which which splits off the audio to the Arc as if by eARC and send the video to the tv. I say at my peril as I have only casually been following this as it is not applicable to me.Confusing when we’re talking about ARC, eARC, Arcana, and Sonos Arc!! Your full fat lossless Atmos via Dolby Digital True HD is ONLY coming from a blu-ray disc/player (or rip), passing through your tv, then through the Arcana, and into the Sonos Arc, where it will be conveyed in all
It’s lossless glory.
Not 100% sure I’m answering what you’re asking?!