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Sonos Arc + AppleTV + Samsung TV = No Dolby Atmos

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My tv is a Samsung QN85QN90AAFXZA. It’s less than a year old and has eArc.
Hooked up the Arc and 4K AppleTV but don’t get Dolby Atmos showing during playback in the Sonos app… It reads “Multichannel PCM 5.1”

Known issue? User error?

Any help would be greatly appreciated

Thanks!

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AirgetlamAnswer

How old is the Apple TV? It needs to be one of the newer ones to support Atmos/ Dolby Digital Plus. Might be worth double checking that your Apple TV supports these formats, especially if that isn’t appearing as an option in the settings. It is running tvOS 16.0 (20J373)?

Bruce

106rallye

What’s the sound output on the Apple TV set to?

Ken_Griffiths

@Clemdog,
Perhaps see this link..

https://support.apple.com/en-gb/HT212714

C

ClemdogAuthor

Avid Contributor I

Default Audio Output - TV Speakers

Audio Format - Off…

These settings really don’t make any sense to me. However changing them around don’t seem to help

C

ClemdogAuthor

Avid Contributor I

@Clemdog,
Perhaps see this link..

https://support.apple.com/en-gb/HT212714

“On your Apple TV 4K, go to Settings > Video and Audio and select Audio Format. Under Immersive Audio, check that Dolby Atmos is on.”

Oddly when I try to do this there’s no selection for “Immersive Audio.”

Ken_Griffiths

@Clemdog,
Perhaps see this link..

https://support.apple.com/en-gb/HT212714

“On your Apple TV 4K, go to Settings > Video and Audio and select Audio Format. Under Immersive Audio, check that Dolby Atmos is on.”

Oddly when I try to do this there’s no selection for “Immersive Audio.”

The TV doesn’t appear to support Dolby Digital Plus (looking in rtings.com) - so I presume that’s the reason, but it does support Atmos via TrueHD (uncompressed)… have you tried it with eARC switched off to see if that might make a difference?

C

ClemdogAuthor

Avid Contributor I

@Clemdog,
Perhaps see this link..

https://support.apple.com/en-gb/HT212714

“On your Apple TV 4K, go to Settings > Video and Audio and select Audio Format. Under Immersive Audio, check that Dolby Atmos is on.”

Oddly when I try to do this there’s no selection for “Immersive Audio.”

The TV doesn’t appear to support Dolby Digital Plus (looking in rtings.com) - so I presume that’s the reason, but it does support Atmos via TrueHD (uncompressed)… have you tried it with eARC switched off to see if that might make a difference?

When I turn of eARC off the Sonos app reads “Stereo PCM.”

Ken_Griffiths

@Clemdog,
Perhaps see this link..

https://support.apple.com/en-gb/HT212714

“On your Apple TV 4K, go to Settings > Video and Audio and select Audio Format. Under Immersive Audio, check that Dolby Atmos is on.”

Oddly when I try to do this there’s no selection for “Immersive Audio.”

The TV doesn’t appear to support Dolby Digital Plus (looking in rtings.com) - so I presume that’s the reason, but it does support Atmos via TrueHD (uncompressed)… have you tried it with eARC switched off to see if that might make a difference?

When I turn of eARC off the Sonos app reads “Stereo PCM.”

I can’t find anything to say that your particular TV supports DD+ (Plus) at all - can you check the user manual. The streaming services use that lossy codec with Atmos metadata to provide Atmos audio - if your TV does not support it, then I think your won’t get Atmos audio other than via Dolby TrueHD lossless. The TV supports the DTS X/HQ formats and Dolby 5.1 and TrueHD instead.

C

ClemdogAuthor

Avid Contributor I

@Clemdog,
Perhaps see this link..

https://support.apple.com/en-gb/HT212714

“On your Apple TV 4K, go to Settings > Video and Audio and select Audio Format. Under Immersive Audio, check that Dolby Atmos is on.”

Oddly when I try to do this there’s no selection for “Immersive Audio.”

The TV doesn’t appear to support Dolby Digital Plus (looking in rtings.com) - so I presume that’s the reason, but it does support Atmos via TrueHD (uncompressed)… have you tried it with eARC switched off to see if that might make a difference?

When I turn of eARC off the Sonos app reads “Stereo PCM.”

I can’t find anything to say that your particular TV supports DD+ (Plus) at all - can you check the user manual. The streaming services use that lossy codec with Atmos metadata to provide Atmos audio - if your TV does not support it, then I think your won’t get Atmos audio other than via Dolby TrueHD lossless. The TV supports the DTS X/HQ formats and Dolby 5.1 and TrueHD instead.

The manual says the following:

”Dolby Digital+ is supported for up to 5.1 channels.“

Ken_Griffiths

@Clemdog,

Does the TV allow you to select that DD+ codec in its audio settings? - if so, then maybe try that and then see what audio you can set on the Apple TV when you power cycle the ATV/TV & Arc after changing that setting.

C

ClemdogAuthor

Avid Contributor I

Nothing on either the tv or AppleTV indicating DD+

This is frustrating…When I bought this tv I specifically made sure it supported eARC pass through. Now that doesn’t matter.

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