Surround sound (5.1 ch) broken except Apple TV app on Apple TV Box

I've spoken to an Apple tech, but we couldn't find a solution. After the latest update, I noticed that Netflix, Disney+, Stan, and Prime Video no longer deliver surround sound (5.1ch). Interestingly, the Apple TV app plays surround sound without any issues. I also tested all my apps (as above) on LG TV, and all of them play 5.1ch sound perfectly. I also tried changing the "Audio Format" to 5.1ch on my Apple TV, but that didn't work either. Since the Apple TV app on my Apple TV Box produces surround sound and the other apps don't, I wonder if there's an issue with the latest update. Has anyone else experienced similar issues?

Apple TV 4K, tvOS 18

Posted on Oct 11, 2024 7:39 PM

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10 replies

Oct 12, 2024 5:00 AM in response to emi179

I have exactly the same issues. 5.1 sound doesn’t work through Amazon or Netflix apps on Apple TV 4K running tvOS18 but does though Apple TV app. 5.1 sound plays okay with same Apps on LG TV. Have also tried changing the audio format in Apple TV settings but makes no difference either. Certainly looks to be an issue with the latest update.

Oct 29, 2024 4:05 AM in response to neilc1973


neilc1973 wrote:

I did say that this resolved the problem for me which was 5.1 sound. You obviously have a different problem so I suggest you search for help regarding Dolby Atmos related problems.

Not Really


When you "force" format by putting “Change Format” to On and “New Format” to Dolby Digital 5.1 you lose the ability to have Atmos when it is available.


The normal behavior is to let it in auto.

When the format is 5.1 it send 5.1 and when it is in atmos it send in Atmos.


The solution you give force the format to 5.1 but it change noting that before OS18 "auto" option was sending the good format regarding the source available.

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Surround sound (5.1 ch) broken except Apple TV app on Apple TV Box

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