Skip to main content
Caspersen
Caspersen
Contributor I
November 7, 2024
Answered

Arc Ultra playback of Atmos 7.1 soundtrack?

Hi Everyone

I cant get the ARC Ultra to show ATMOS 7.1 it will only show ATMOS 5.1

I was so looking forward to the 9.1.4 setup showing the 7.1 on the App?

I am playing on a TV with eARCH and currently using the PLEX player.
(All my 4K BluRay ATMOS disc is ripped with all content to mkv)

My Surround receiver shows it correctly.
 

My questions:

  1. Is there a difference in quality between the Atmos 7.1 vs Dolby Digital Plus 7.1 playback?
  2. Is this the HDMI problem? do I need to invest in a Switch like the FeinTech VAX04101A or the HDFury Arcana to get ATMOS Recognized correctly?
  3. Would a Shield Pro fix this problem?
  4. Has ANYONE gotten a ATMOS 7.1 to show up on the Sonos Ultra App?
  5. I can see it shows DTS 5.1 when playing old movies does this mean it now plays DTS?

Thanks looking forward to hearing from the experts :-)
Best regards
Casperse

 

 

 

This topic has been closed for further comments. You can use the search bar to find a similar topic, or create a new one by clicking Create Topic at the top of the page.
OutburstAnswer
Enthusiast II
November 11, 2024

I have tested with the 7.1.4 video from https://www.demolandia.net/cinema/dolby-demo-trailers-hd/page-10.html and the Sonos app shows me Dolby Atmos.

View in thread

11 replies

Show previous replies
sigh
sigh
Prodigy II
November 25, 2024

Just an update:

I could only get the Atmos when using a SHIELD media player.
Using eARC.

 

Using the Appletv4K newest version was not working! PCM output

Using the TV as a player Emby/Plex/JellyFin/ didnt work.

Is there any trick to get the AppleTv working? my kids really like the UI

Short answer: No.

Apple TV is not able to passthrough the “high end” Atmos Version based on Dolby True HD.

It will only send the “normal” Atmos Version used by the Streaming providers like Netflix using a special Version called DOLBY MAT.

There’s nothing special about Dolby MAT it is Dolby encoding format for PCM + Atmos metadata. Dolby themselves use it in the Dolby Access application they provide for Windows PCs. As Apple only support PCM output and not bitstreaming, Dolby MAT is the appropriate encoding format for them to use.

 

Only streaming device capable of passthrough of Dolby True HD with Atmos is the shield.

In the past this may have been true, but multiple brands of Android based boxes support TrueHD Atmos streaming these days. FireTV, Dune, Zidoo spring to mind off the top of my head. While they all have different strengths and weaknesses, the Shield is probably still the best all round Android device.

Terms & ConditionsAccessibility statement