Skip to main content
tomrw89
Contributor I
October 7, 2023

Only Stereo PCM from Apple TV since TV OS 17

  • October 7, 2023
  • 14 replies
  • 6626 views

I’ve noticed ever since upgrading to TV OS 17 on Apple TV 4K (2021), I only get stereo PCM from any 5.1 audio source. Dolby Atmos output works fine. 

Other sources (e.g. PS5) play LPCM 5.1 fine - any ideas? I’ve been able to get it briefly but it then reverts back to stereo.

It could very much be Sonos not supporting TV OS 17 (as with iOS17)

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.
Pinned Reply By Remotes and Devices

I ran into sound issue after I moved a 4K Apple TV to a new room, connecting it to my Samsung 4K television and my Sonos play base. I tried making adjustments using the TV button on the Apple TV remote and connecting sound through the updated sound and quick settings button. I also try to go into the sound system settings inside of the Apple TV. I tried going into the settings inside of the Samsung television, as well as Sonos settings. I found the solution in the Apple TV settings, under remotes and devices.  In the home theater control setting, select that the control TVs and receivers is on. Ake sure the volume control is set to auto not HDMI not TV via IR or Samsung via IR. Set to auto to allow   adjusting sound using your remote control and coming out of the Sonos.

14 replies

Show previous replies
dyllionos
Lyricist III
January 25, 2024

I’m having the same issue of only seeing stereo pcm from Apple TV.  Seems like tvOS 17 was the culprit as I don’t recall the issue before.  I’ve checked everything (cables, changed audio format to 5.1). I am getting 5.1 when signal direct from TV. So frustrating!

Peter_254
Prodigy II
January 25, 2024

I’m having the same issue of only seeing stereo pcm from Apple TV.  Seems like tvOS 17 was the culprit as I don’t recall the issue before.  I’ve checked everything (cables, changed audio format to 5.1). I am getting 5.1 when signal direct from TV. So frustrating!

 

After the update yesterday, the challenge is solved with dolby 5.1... At least for me..

New software update 24/1-24

    dyllionos
    Lyricist III
    January 25, 2024

    I’m not seeing it fixed on my version. Additionally when I check my TV digital output settings, Dolby digital is greyed out which is what leads me to believe it’s Apple TV related. 

    Peter_254
    Prodigy II
    January 25, 2024

    I’m not seeing it fixed on my version. Additionally when I check my TV digital output settings, Dolby digital is greyed out which is what leads me to believe it’s Apple TV related. 

     

    My Apple TV 4K (2 gen) is updated to 17.3 (21K646)
    My Samsung S90C is on 1310.3.
    SONOS is on 15.11 but was updated on 24/1 with a newer build version, still 15.11

    On my Apple TV I have:
    Sound out: TV speakers
    Audio format: Change format (off) Dolby Atmos (on)
    Reduce loud sounds: off

    On my TV:
    Audio Output: Optical
    Digital output format: Auto

     

    For me it works now, also the SONOS App became much faster, no lag when I adjust the volume.

    Terms & ConditionsAccessibility statement