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If any NowTV subscriber enables their Developer options on their ATV 4K the HUD playback overlay will clarify what the video and audio streaming codecs and bitrates used for audio are (which may differ from the output format - as ATV 4Ks usually decode to PCM multichannel rather than bitstreaming compressed audio formats)
noggin
Founding member
After many years, the latest NOWTV app has launched on AppleTV today, fully equipped with HD, Boost and the extra streams. There's a discussion as to the audio standard availability. Still no catalogue of Sports Replay though although that's common across platforms.
If any NowTV subscriber enables their Developer options on their ATV 4K the HUD playback overlay will clarify what the video and audio streaming codecs and bitrates used for audio are (which may differ from the output format - as ATV 4Ks usually decode to PCM multichannel rather than bitstreaming compressed audio formats)