Apple Seeds Second Public Beta of tvOS 12.2 for Fourth and Fifth-Generation Apple TV

I didn't know our AVRs didn't already do the decoding! So it's done on the Apple TV box? I have my sound output sent to Multi-channel. Always thought my AVR did the decoding...

That's correct. At least for now/temporarily. Happened sometime around tvOS 11.3, I believe.

I'll use my receiver as an example. When I play a Dolby Atmos movie from my UHD BD player, my receiver displays "D.Atmos." Pretty straight forward; the player is passing the audio to my receiver to be decoded, which reads it as Dolby Atmos (because it's seeing the Dolby Atmos container).

The Apple TV 4K, however, does the decoding itself. It decodes Dolby Atmos first, and then sends that audio on as an uncompressed LPCM stream. As a result, my receiver displays "Multi" when I'm playing a Dolby Atmos movie from Apple TV 4K since the audio is being read as LPCM.

That's correct. At least for now/temporarily. Happened sometime around tvOS 11.3, I believe.

I'll use my receiver as an example. When I play a Dolby Atmos movie from my UHD BD player, my receiver displays "D.Atmos." Pretty straight forward; the player is passing the audio to my receiver to be decoded, which reads it as Dolby Atmos (because it's seeing the Dolby Atmos container).

The Apple TV 4K, however, does the decoding itself. It decodes Dolby Atmos first, and then sends that audio on as an uncompressed LPCM stream. As a result, my receiver displays "Multi" when I'm playing a Dolby Atmos movie from Apple TV 4K since the audio is being read as LPCM.

Hey There,

I do notice on my Yamaha receiver when playing a film with Dolby Atmos from apple tv 4k:

1)Receiver lights up with "DTHD"
2) Then " Decoder"
3)Then finally ends on "ATMOS/PCM"

I did read its some type of newer ( or older) dolby container. But yes, at the end of it: the Apple tv is doing the decoding and my Yamaha ( thank goodness ) lights up "ATMOS/PCM" and its does sound pretty damn good ( most of the time) in case anyone is interested the receiver is a YAMAHA RX-A770

How about passthrough audio so that my receiver can do the decoding.