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Brooktop
Contributor II
September 16, 2024
Answered

Apple TVos18 broken 5.1 surround

I’ve just updated to Apple tvOS18 and now my 5.1 movies are only outputting on my Sonos Arc in Stereo PCM. Atmos movies are still playing in Atmos. Is this a bug with the new software?

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Houndog1000Answer
Trending Lyricist I
October 29, 2024

I’m happy to report that the recent TVOS 18.1 update has fixed the problem…

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9 replies

106rallye
106rallye
September 17, 2024

The Apple update might have changed the sound settings on the Apple TV. What are those settings now?

BrooktopAuthor
Contributor II
September 17, 2024

Still on Auto, as it was before. Even turning off Atmos results in Stereo PCM output. 

Corry P
Corry P
Sonos Staff
September 20, 2024

Hi @Brooktop 

Welcome to the Sonos Community!

If the only change that has been made is that you updated to iOS 18, then I recommend that you contact Apple for assistance - if you are able to play Atmos, then it is very likely that all the settings are as they should be. A reboot of all three devices (unplug TV and Beam from power, restart Apple TV) may help, but I rather doubt it.

I hope this helps.

"Common sense is the collection of prejudices acquired by age eighteen." - Albert Einstein
Houndog1000
Trending Lyricist I
September 24, 2024

I’ve just updated to Apple tvOS18 and now my 5.1 movies are only outputting on my Sonos Arc in Stereo PCM. Atmos movies are still playing in Atmos. Is this a bug with the new software?

I having the same issue. I wouldn’t change anything if I were you and just wait for the TVOS update...

Houndog1000
Trending Lyricist I
September 26, 2024

Update: YouTube app (the only one seemingly being played in 5.1 according to the Sonos app) is now outputting Stereo PCM with a drop in volume. Strange….

    Houndog1000
    Trending Lyricist I
    September 26, 2024

    Update: YouTube back to 5.1. DD 5.1 test video working properly. All other apps still Stereo PCM. Even stranger…

    Peter_254
    Prodigy II
    September 27, 2024

    Something has happened after the 18.0 update..
    In the past I only got 5.1 if I forced the Apple Tv 4K to output 5.1 sound.
    After the update I have set Apple Tv 4k to auto and Atmos on auto, now I get 5.1 when it is supported.

    Houndog1000Answer
    Trending Lyricist I
    October 29, 2024

    I’m happy to report that the recent TVOS 18.1 update has fixed the problem…

      BrooktopAuthor
      Contributor II
      November 7, 2024

      I’ve not had an update (even Beta) for weeks. Still getting Stero PCM.

       

      I gave up and got a 4K Fire TV stick. 

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