Here’s the thread: Apple TV 4K audio sync issues with enhanced player
Currently no fix/workaround for the problem. I’ve a family member w/ an ATV, so hoping this gets resolved at some point.
FYI, eARC not a factor. ATV is connected directly to the Sony, so audio never goes through the TV. eARC would apply if the ATV was connected to the TV or for any TV based apps.
You can also try the Plex app on the LG. I’m not aware of any audio sync problems with it. The Plex LG app is not without its own limitations. Namely, if the media is direct streaming (i.e. audio is transcoding) and subtitles are enabled, then the video will also transcode. This means avoiding subtitles when playing media with TrueHD or DTS audio, since LG supports neither of those audio codecs.
