Apple TV 4K, Sonos Arc and Dolby Atmos

I have the new Sonos Arc Soundbar with Dolby Atmos support and a Apple 4K tv. An Apple article says to connect the ATV 4K directly to a Soundbar via the HDMI Cable. Each device has 1 HDMI port so if you do that there is no way to get the signal back to the TV? Currently my ATV is on HDMI Port 3 and the Sonos Arc Soundbar is in HDMI Port 4 the ARC Channel. Also in the ATV settings under audio format I don’t get the option to select immersive audio which is where the Atmos setting should be listed. And the TV is a 3 year old Samsung so there should be no issues here with the TV. Ideas?


Thanks.

Posted on Jun 11, 2020 7:25 PM

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Posted on Jun 14, 2020 4:43 PM

Hi!


I did some digging around.


In the article "Play audio in Dolby Atmos or surround sound on your Apple TV" there is this smal text:


"*Some sound bars and AV receivers support Dolby Atmos, but don’t support video formats like HDR10 and Dolby Vision. In this case, you can plug your Apple TV 4K into either the sound bar or AV receiver to play sound in Dolby Atmos. Or you can plug your Apple TV 4K into your television to watch video in HDR and Dolby Vision. To do both, you need a television or an AV receiver or sound bar that supports both Dolby Atmos and high-quality video formats. Apple TV 4K uses a high bandwidth form of Dolby Atmos that doesn’t work over ARC connections."


So basically you need to plug in your Apple TV 4K in to your soundbar / AV receiver or use a connection that supports a higher bandwidth.


Now comes the bad part.

Because the Sonos Arc only have one HDMI port and, as you said, the only connection you can have is from Apple TV 4K to the TV and then from the TV to the Sonos Arc means your TV need to have eARC to be able to support the higher bandwidth and send it though to the Sonos Arc.


I understand that this isn't something you like to hear and I feel the same as I'm in the same situation with my Philips TV but I guess we can always leave a feedback for Apple.



The TLDR-version:

To use the Sonos Arc with your Apple TV 4K your TV need to have a eARC connection support.

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100 replies

Jul 26, 2020 6:33 AM in response to JoarNord

JoarNord, it is essential in this community to post something that is true, and tried and tested. What you posted above is actually nonsense. I'd explains my setup.


  1. Apple TV 4k --> Over high rest HDMI 4 K (48Gbps, HDMI 2.1 certified) cable connected to LF OLED C9, that supports Dolby Atmos, HDR10, Dolby Digital and also Dolby Digital. So from Apple TV to HDMI port 3 on this $1500+ new 2019 model TV.
  2. TV has eARC enabled.
  3. Sonos ARC (also on a 48Gbps, HDMI 2.1 certified) cable connected to the eARC port (HDMI port 2 of my TV).
  4. On the TV, eARC is enabled, and sound passthrough is enabled.
  5. On the Sonos ARC, audio compression is set to Auto (via the App).


The center channel is gone when you play Netflix in Dobly Atmos, or even Apple TV purchased / rented movies.

Only when the audio is changed from pass-through to auto on the TV ( step 4) above, you hear the audio, but Dolby Atmos logo is not displayed on the Sonos App. So it means it's down-ressing it to Dolby Digital.


Keeping the same settings on and playing the same movie from XBOX, I get tip quality Dolby Atmos, Dolby Digital and HDR no problem and even the Sonos App display the Dolby Atmos logo in the app.


My conclusion - Apple TV is buggy, a piece of plastic Cr**p , untested and falsely advertised. I spent over $1000 and hours fidgeting around to come to this conclusion. And no people, stop blaming a HDMI cable, since as I mentioned, on even a $30 cable, XBOX has no issues sending Dolby Atmos / Dobly digital signals



Jul 26, 2020 7:07 AM in response to pghatak

pghatak,


I'm on a similar thread on the Sonos Community page. One of the contributors is getting Dolby Atmos through his Sonos ARC, streaming content from an Apple TV 4K with a LG E9 TV. He has screenshots and very thorough explanations for everything.


I can't comment personally that it works - but this contributor seems highly credible. I'm getting a new LG GX later this week, so I've been scouring the internet to understand if I would be able to get atmos with the above setup, and his post convinced me it was possible. I can comment if my setup works once I install the TV in a few days.


https://en.community.sonos.com/home-theater-228993/lpcm-eta-for-arc-6842558?postid=16455437#post16455437

Contributor: ewolkoff




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Apple TV 4K, Sonos Arc and Dolby Atmos

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