On the website it says:
Sonos products that connect to your TV using HDMI-ARC are compatible with both IR and RF remotes. Make sure your TV has CEC enabled and your Sonos home theater product is connected to the HDMI-ARC port on your TV.
So, what I don’t understand is how does that allow my remote (an RF remote to a A/V receiver) to control the volume? If I have the A/V receiver connected via a normal HDMI cable, and the Beam connected to the HDMI-ARC, when I adjust the volume on my A/V receiver, will the Beam adjust it’s volume?