A number of Apple TV app and set-top box users are reporting a curious issue in which some content, including purchased and rented shows, play without audio.
The sound issue appears to be sporadic, affecting some users and content while leaving others unscathed.
At first glance, it looked as though the sound troubles could be traced back to the Apple TV app, with users saying movies bought or rented through the service would play without audio. As noted by 9to5Mac, some users were accessing the Apple TV app through hardware like Roku devices.
However, Apple TV set-top owners have suffered similar problems in third-party apps.
"[S]ound isn't working for any of the Apple TV shows for me either, but also Netflix and Prime video aren't playing sound too. Makes the Apple TV useless, only YouTube works on it for me now," said Twitter user Ben Meighan-Carey.
Interestingly, movie previews are apparently unaffected by the issue.
Meighan-Carey, who owns a first-generation Apple TV 4K, conducted a bit of troubleshooting and found that audio can be heard through a pair of connected AirPods. Further, he discovered what could be a workaround by changing audio output to stereo in Settings > Video and Audio > Audio Format > Change Format.
It has been theorized that the problem lies with Apple's native device video player as apps that don't use the protocol, like YouTube, play back sound without issue. The hypothesis, however, does not account for audio trouble experienced on third-party hardware.
Apple has not commented on the issue, though its support team has responded to dissatisfied users on Twitter.