Avid Contributor II

Answered

No Atmos sound via Sonos Arc

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Hi, just connected new LG OLED TV to new Sonos Arc . All connections and set up verified by Tv and Sonos app. I can’t get anything to play with Dolby Atmos through the Arc even if I try Apple TV4K with movies featuring Atmos. Any assistance would be appropriated. TY

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NoelAnswer

Avid Contributor II

Managed to solve the issue.
Discovered a “support eARC’ setting in LG TV advanced audio menu that needed switching on. This was in addition to the main audio output selection, and all the other selections that had already been selected.
Thanks to all for helping out.

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NoelAuthor

Avid Contributor II

Hi - I meant to type ‘appreciated’

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GuitarSuperstar

Lead Maestro

What specific LG TV model do you have? Can you post your current audio settings?

"Receive with simplicity everything that happens to you." - Rashi

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NoelAuthor

Avid Contributor II

LG OLED55C14LB (2021) OLED HDR 4K Ultra HD Smart TV, 55 inch with Freeview Play/Freesat HD & Dolby Atmos

Audio output for Arc is selected on Tv and both devices are connected via the specified port for this on the TV

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GuitarSuperstar

Lead Maestro

Be sure eARC is enabled in your TV settings. Also be sure HDMI Input Audio Format is set to Bitstream and Digital Sound Output is set to Auto.

On your Apple TV, set Change Format to Off and turn on Immersive Audio.

"Receive with simplicity everything that happens to you." - Rashi

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NoelAuthor

Avid Contributor II

All the settings above had been selected- just double checked them.

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GuitarSuperstar

Lead Maestro

Do you have a Netflix premium subscription? If so, when you watch the show Ratched on Netflix either on your TV’s native Netflix app or on the Apple TV, what audio does the Sonos app say the Arc is receiving?

Is there a Passthrough option for Digital Sound Output? If so, try that setting.

"Receive with simplicity everything that happens to you." - Rashi

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NoelAuthor

Avid Contributor II

Yes - have Netflix Premium and Apple TV 4K.
Sonos App shows everything playing as stereo PCM. This happens even though the film/programme is in Dolby Atmos.
I also have the Sonos Arc intermittently deciding it’s not connected to the TV, which it clearly is . This is a problem I’ve noted a lot of users appear to have, as there are quite a few posts on the subject.

I don’t have the Passthrough option you mentioned.

This is all quite frustrating and I’m wondering if the Sonos arc is fit for purpose!

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Silverthorn

Prodigy II

You don't get Atmos with the TVs Netflix app? Wouldn't have thought you would need to configure anything for that to work other than adding the arc.

Does CEC need to be turned on with these newer TVs?

"I saw the Stooges and the MC5"

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Silverthorn

Prodigy II

Be sure eARC is enabled in your TV settings. Also be sure HDMI Input Audio Format is set to Bitstream and Digital Sound Output is set to Auto.

On your Apple TV, set Change Format to Off and turn on Immersive Audio.

I wonder if Digital sound output needs to be set to pass through. Looking at the manual, that’s the only thing I can think of.

"I saw the Stooges and the MC5"

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Silverthorn

Prodigy II

Here is the manual I believe for reference.

http://kr.eguide.lgappstv.com/manual/w21/global/Apps/w6.0_e04/e_eng/settings.html#

"I saw the Stooges and the MC5"