The Sonos Arc needs to connect to the HDMI-Arc port 2 (I believe) on your TV, directly or indirectly - it uses the Audio Return Channel to play the sound from your TV - I assume you currently have your Hue Sync Box Switch connected to one of your other TV HDMI ports and that your connected devices (Cable TV etc.) are attached to the Sync Box. Your TV doesn’t support uncompressed TrueHD Atmos Audio in this type of setup, but you could perhaps consider adding the HDFury Arcana into the mix to bypass the TV. See the attached diagram that I have adjusted to show you my thoughts for your setup.

Thanks Ken

You are almost correct regarding my current setup. Everything is connected to the receiver, which in turn is connected to the Sync box

And the Arcana would then still connect to the ARC input?

Is the device plug and play, I have tried HDFurys products before and gave up trying to configure it.

I don’t have the Arcana to comment as I use one of these instead…

Feintech VAX04101A

https://feintech.eu/en/products/feintech-vax04101-hdmi-earc-pass-switch-4x1

This is plug and play and it works great with my TV setup and a Beam (Gen2)… it’s like the Arcana but with a ‘switch’ built-in. I didn’t suggest it as you have the Sync Box as your switch already, but you can of course use the Feintech product in place of the Arcana if you need the extra HDMI inputs.