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Openaperture

macrumors member
Original poster
Sep 21, 2017
31
3
Ive just updated to tvOS 12.0 on the Apple TV 4

Start up screen after refresh shows that Dolby Atmos is a new feature but cant seem to find a setting to enable it and its not working with any movies including ones with the Atmos logo on the menu?
 

benji888

macrumors 68000
Sep 27, 2006
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United States
EDIT: scratch my first paragraph.


FYI: tvOS 12 will take the DD+ Atmos stream, mix it with system sounds and convert and output it as LPCM...Dolby MAT 2.0. So, it won't necessarily light up like Dolby TrueHD Atmos or DD+ Atmos from other devices.

"Dolby Atmos in Dolby MAT

The Dolby Metadata-enhanced Audio Transmission (Dolby MAT) encoder resides in a Blu-ray player to pack the variable bit-rate Dolby TrueHD bitstreams for transmission over the fixed bit-rate HDMI connections. A MAT decoder is subsequently employed in an AVR to unpack the Dolby TrueHD bitstreams. With the introduction of Dolby Atmos, we have expanded this technology to support encoding of Dolby Atmos content as lossless pulse-code modulation (PCM) audio.

A key benefit of Dolby MAT 2.0 is that Dolby Atmos object-based audio can be live encoded and transmitted from a source device with limited latency and processing complexity. Among the possible sources are broadcast set-top boxes, PCs, and game consoles. The Dolby MAT 2.0 decoder in an AVR outputs the object-based audio and its metadata for further processing. The Dolby MAT 2.0 container is scalable and leverages the full potential of the HDMI audio pipeline."
from pg. 12 here: https://www.dolby.com/us/en/technologies/dolby-atmos/dolby-atmos-for-the-home-theater.pdf
 
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benji888

macrumors 68000
Sep 27, 2006
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Ok then, OP try:

Settings>System>Restart (I know it sounds silly, but, just try it),

and also restarting your router.
 
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Openaperture

macrumors member
Original poster
Sep 21, 2017
31
3
Ok then, OP try:

Settings>System>Restart (I know it sounds silly, but, just try it),

and also restarting your router.


Already done that and reset the ATV4 as new.

Do you have an Apple TV4 working with atmos?
 
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JasonHB

macrumors 6502a
Jul 20, 2010
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Warwickshire, UK
I can confirm also that Atmos does light up as a flag on the AV receiver.

Worth mentioning (I’m sure you know this) that it only works when set to PCM, and not Dolby Digital

Jason
 
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RyanMTS

macrumors member
Jun 16, 2009
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0
More Atmos films have started to work for mine. Perhaps Apple just needed to release the rights from the various studios. Jurassic Park:Fallen Kingdom and Baby Driver are now working and displaying "Dolby Atmos" on my AVR.
 
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benji888

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Sep 27, 2006
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United States
I can confirm also that Atmos does light up as a flag on the AV receiver.

Worth mentioning (I’m sure you know this) that it only works when set to PCM, and not Dolby Digital

Jason
More Atmos films have started to work for mine. Perhaps Apple just needed to release the rights from the various studios. Jurassic Park:Fallen Kingdom and Baby Driver are now working and displaying "Dolby Atmos" on my AVR.
ATV 4th generation (1080p) or ATV 4K?
 
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Openaperture

macrumors member
Original poster
Sep 21, 2017
31
3
More Atmos films have started to work for mine. Perhaps Apple just needed to release the rights from the various studios. Jurassic Park:Fallen Kingdom and Baby Driver are now working and displaying "Dolby Atmos" on my AVR.

On what though - an Apple TV4K or TV4?
 
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benji888

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Sep 27, 2006
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... everything I'm reading on Dolby Atmos is only related to the ATV 4K, but, it should work with the ATV 4th gen., there is no real reason for apple to limit it only to the 4K, they have the same audio capabilities, at least up until now, and hardware-wise.

Here is Apple Support page for playing audio in Dolby Atmos or surround sound... https://support.apple.com/en-us/HT204069
 
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priitv8

macrumors 68040
Jan 13, 2011
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Estonia
... everything I'm reading on Dolby Atmos is only related to the ATV 4K, but, it should work with the ATV 4th gen., there is no real reason for apple to limit it only to the 4K, they have the same audio capabilities, at least up until now, and hardware-wise.
Unless Atmos processing into PCM requires A10X's extra CPU horsepower.
 
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priitv8

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Jan 13, 2011
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But, why exactly? it's just an audio codec, it does not require mass amounts of processing power like video does.
I wish I knew the answer. But I don't.
Of course, can also be 100% product placement question. To keep 4K differentiated from 4.
 
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BODYBUILDERPAUL

macrumors 68000
Feb 9, 2009
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But, why exactly? it's just an audio codec, it does not require mass amounts of processing power like video does.

Maybe they will introduce it for the 4 soon like they did a few months on with the auto frame rate switching. Since it is still current there is hope!
 
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Openaperture

macrumors member
Original poster
Sep 21, 2017
31
3
I spoke with someone from technical support on the apple care line for the apple TV and they confirmed ONLY the Apple TV4K supports Atmos not the Apple TV 4
 
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Openaperture

macrumors member
Original poster
Sep 21, 2017
31
3
Atmos only comes with 4K material.

ATV 4 is HD only, hence doesn't receive Atmos from a 4K source.

Certainly used to be the case that there was 1080p material that had Atmos ( and sometimes hdr metadata too)

But you still needed the Apple TV 4K to access it
 
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bluraycinema

macrumors member
Sep 14, 2015
32
10
Certainly used to be the case that there was 1080p material that had Atmos ( and sometimes hdr metadata too)

But you still needed the Apple TV 4K to access it

My mistake.

As regards Blu-ray, then Atmos is on non 4K discs. Plus Atmos is available from a 4K disc on a 1080P screen.

I was saying that Apple Atmos is only available on a ATV 4K @ 4K resolution, with no downscale option, at the moment anyway.
 
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Openaperture

macrumors member
Original poster
Sep 21, 2017
31
3
Nothing to do with Blu Ray, there were iTunes films that were 1080p only with atmos.

But you needed a Apple TV 4K to acccess the atmos track anyway.

They’ve probably been upgraded to 4K now like most.
 
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benji888

macrumors 68000
Sep 27, 2006
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United States
This is b.s. from Apple because they could allow any ATV with tvOS 12 to utilize Atmos audio, it’s not like it takes some special hardware, firmware update able AVRs could do Atmos with an update ...VUDU had Atmos years before they had 4K/UHD...limited blu-ray discs have had Atmos since 2014, though, many more blus could have had Atmos pre-4K/UHD, amongst those 1080p blus, game of thrones has been released with Atmos since 2015, with previous seasons re-released with Atmos.
 
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