My AppleTV (4K, latest version) only passes through a PCM Stereo audio signal to my soundbar instead of a Dolby 5.1 on shows that say they are 5.1. Oddly, Dolby Atmos works fine. I've tried various settings on the AppleTV and my SamsungTV, but I can't get anything but a Stereo PCM audio on non-atmos content. Note: I am using the Beta TVs 17, so I'm thinking it could be a glitch in the new software.
AppleTV only passes through StereoPCM (TVs 17)
Same problem here... looking at other sites, there are several of us with the problem. This did not happen in tvOS16, I have 4 units. 1 AppleTV 4K 2017 without audio problems 1 AppleTV 4K 2021 without audio problems 2 AppleTV 4K 2022 with problems.