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apple tv 4k theater set up: arc ultra era 300’s gen 3 sub

  • August 16, 2026
  • 28 replies
  • 193 views

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28 replies

  • August 20, 2026

When I play an Atmos track using Apple Music on the Apple TV device, it plays as Atmos on Sonos. Turn CAC off so you can see the actual format in Sonos. Because with CAC on, all audio is sent Dolby MAT which Sonos displays as Dolby Atmos, whether is is Atmos or not. In which case you can’t see what the actual audio format is.

I just tested this with the album RPWL - World Through My Eyes (Revisited) - 20th Anniversary Version.

Make sure in the Apple TV settings → Apps → Music → Dolby Atmos = Automatic.


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  • August 20, 2026

When I play an Atmos track using Apple Music on the Apple TV device, it plays as Atmos on Sonos. Turn CAC off so you can see the actual format in Sonos. Because with CAC on, all audio is sent Dolby MAT which Sonos displays as Dolby Atmos, whether is is Atmos or not. In which case you can’t see what the actual audio format is.

I just tested this with the album RPWL - World Through My Eyes (Revisited) - 20th Anniversary Version.

Make sure in the Apple TV settings → Apps → Music → Dolby Atmos = Automatic.

The crux of this solution is changing my settings in my tv (lg oled g4) ::

When I disable I get pcm stereo for music and movies and since it’s my theater that’s a big compromise. 


  • August 20, 2026

When I play an Atmos track using Apple Music on the Apple TV device, it plays as Atmos on Sonos. Turn CAC off so you can see the actual format in Sonos. Because with CAC on, all audio is sent Dolby MAT which Sonos displays as Dolby Atmos, whether is is Atmos or not. In which case you can’t see what the actual audio format is.

I just tested this with the album RPWL - World Through My Eyes (Revisited) - 20th Anniversary Version.

Make sure in the Apple TV settings → Apps → Music → Dolby Atmos = Automatic.

The crux of this solution is changing my settings in my tv (lg oled g4) ::

When I disable I get pcm stereo for music and movies and since it’s my theater that’s a big compromise. 

I don’t know what else to suggest. Atmos music on Apple TV’s Music app does work. Maybe your TV settings?  I don’t have an LG, so can’t help you there.