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Andrewnoob
Avid Contributor I
November 28, 2020
Answered

Sonos ARC, Xbox Series X and LG CX - One confused daddy

Ok, so I got a new TV yesterday, an LG CX. I am coming from a B7.

 

My understanding of earc, Sonoe ARC etc are not great. Obviously I was using compressed audio all the time with the B7 give it only has ARC and not eARC.

 

I am now confused about what I should set my Xbox Series X audio output to - Dolby Atmos Bitstream, which does give Atmos on the Sonos ARC, but there’s the sync delay.

 

Or select one of the uncompressed sources. When I select uncompressed 5.1 or 7.1, I get intermittent sound from the Sonos. My Nintendo Switch works fine with 5.1 Uncompressed PCM.

 

What’s the best setting for audio on my Xbox? Is it still Bitstream Atmos (Does the ARC support uncompressed Atmos?)

 

Otherwise everything else is working fine, after a lot of fiddling.

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controlav
controlavAnswer
Lead Maestro
November 28, 2020

Make sure you have updated the firmware on your LG CX.

You should be using the Dolby Atmos Bitstream output. If sync issues persist, what content are you playing on your Xbox exactly when this happens?

Author of the leading independent Sonos apps for Android, MacOS, iOS, Windows and Xbox.
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Roman535
Lyricist I
February 4, 2021

I have LG B9, Xbox Series X and few days ago I bought Sonos Arc. I set Xbox to Bitstream and Dolby Atmos (it wanted to download Atmos app to my xbox and some kind of registration). 
I have absolutely no problem with sync. Dialogs in games are synced and even Youtube on Xbox is working great - no sync issue (or if there is delay it is really minimal and not very noticable).
Maybe there was an update:) I just wanted to notice new users that in my case no problem with Arc and sound is beautiful! 

Note about uncomressed 5.1 - if I select this on my Xbox Series X the sound is dull and tiny - don’t like it. Dolby Digital was much better option. But Dolby Atmos is the best.

Note about eArc on TV - I had to turn on eARC in settings of my TV! By default it was turned off and worked as old ARC port
 

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