One of the SAMSUNG HDMI ports is marked “eARC”. This is the port to be connected to the SONOS ARC ULTRA. Use the other HDMI ports for the input devices such as SkyQ.

I recommend powering down SONOS and SAMSUNG for at least two minutes and remove all HDMI connections to the CONNECT Box. Next, power up both units and let them boot. Next connect only the ARC ULTRA and let the two units negotiate their capabilities. At this point you’ll be able to navigate the SAMSUNG menu a set up it’s networking. You may need to enable the SAMSUNG’s “Anynet” before you can control ARC’s Volume. Now you can connect everything else.

Thanks buzz …… even though I have had home cinema setup for a while … I am still a bit of a noob around how the ports etc all work.  So .. just for me to understand …. if I connect the Arc Ultra to the eArc port on the One Connect Box …. then whatever “source” I am watching on the TV (Sky, HDMI device etc) … this will then be sent via the eArc to the Arc Ultra .. also the same with “inbuilt” apps on the TV (Netflix etc) … the sound from those will get routed via the eArc port to the Arc Ultra?

Correct. There is a potential for some glitches because standards for who is in charge are a bit lax. Get back to us if there seems to be a fight for control.

Thanks Buzz .. appreciated.  Not bought it yet …. doing my research to confirm it is compatible and will work before diving in.  What “glitches” are you thinking of?

Many signals travel over the HDMI connection in addition to the obvious picture and sound that you expect. In the old days something would send programs to the TV, possibly through a A/V receiver. Now the TV can also send audio and video back to the sound system when playing Apps on the TV.

One set of signals is CEC (Consumer Electronics Control). The goal is to allow the user to simply drop a disc into a player, and the other components will power up and select inputs. Unfortunately, the communication over CEC is poorly standardized and there can be glitches when one box attempts to take exclusive control. One of my favorite little glitches is the early morning cable box update. At the end of the update, as a ‘convenience’ for the user, the cable box will power ON. CEC then assumes that a user wants to watch TV — and wakes the user. Game boxes and AppleTV can be a pain because they often assume that they are the center of your universe.

There are workarounds if you need them.