The issue ultimately ended up being the Apple TV. Fortunately a software update fixed it and now can pump out Dolby Vision and Atmos, as demonstrated by watching the opening of Baby Driver.
@stevestreza Oh damn I’m having the same problem with my HDMI audio extractor, but Dolby Vision just straight-up doesn’t work or display as an option
Follow friends and discover new ones. Publish anything you want: links, pictures, text, video. This server is run by the main developers of the Mastodon project. Everyone is welcome as long as you follow our code of conduct!