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tvOS 14.4 dolby atmos in netflix app

cooldongle

macrumors newbie
Original poster
Feb 22, 2021
4
0
I remember it used to be an issue last year where atmos were broken in netflix app on apple tv. Does anyone still have that issue where you can't get dolby atmos to show up in netflix on apple tv? I have the apple tv 4k (tvOS 14.4) connected directly to samsung Q900t soundbar then the soundbar connected via arc to my sony x900f. I can see in the apple tv setting that atmos is available and I can get it in both itunes store and disney+, but I seem to have trouble getting atmos working for netflix (and sometimes primevideos). Dolby atmos works fine if I run the native netflix app on my sony tv with andriod tv (my guess is that the arc passes DD+ just fine to my soundbar). When I try it on the netflix app on my apple tv, only the 5.1 badge shows up.
 

waw74

macrumors 68040
May 27, 2008
3,887
506
if you've got atmos in Disney+ then you didn't install the update that came out in the last week or you haven't checked recently, as it seems to have broken atmos for quite a few people.

Prime has very very limited atmos titles, the last season of "the expanse" has it. I'm not sure what else does.

On Netflix, I just tried altered carbon S01E01 and it played in atmos

I've got a LG-CX and sonos Arc.
 
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cooldongle

macrumors newbie
Original poster
Feb 22, 2021
4
0
damn I didn't know there is a problem with disney+ as well. I actually am not too certain that disney+ is working for me. I checked by turning down all the other drivers except for the top firing one and see if it's making sound. (not sure if this is a valid way to test at all? my soundbar doesn't tell me whether it is playing atmos or not). :(
 
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waw74

macrumors 68040
May 27, 2008
3,887
506
Disney only broke themselves very recently, it's been since valentines day.

that's not a great way to test for atmos, those channels could be working fine, but the sound designer decided that there shouldn't be anything in them at that point in the show. unless you can actually see a read out, it's really hard to determine what kind of signal it is with 100% certainty.

Sometimes your TV will display the type of audio, My LG will say "Dolby Atmos" or "dolby audio" for regular dolby surround but that's it. for me I have to bring up the info display, then click on that.
it looks like there may be a "display" button on the remote, it's mentioned in the text in the manual, but I don't see it in the pictures.

you can enable a display on the appleTV, which will show you what kind of audio it's playing.
You'll need Xcode on your Mac, it's free, you might need to sign up for a developer account (also free, you don't need anything that's in the paid level). It's a massive download (almost 12GB) so you'll need a fast connection, some time, and a decent amount of space on your drive. By the time it unpacks the installer, and installs the files, it uses over triple the space for a bit (I'd say at least 50GB free on your drive before you start to download, a lot of that is only used during install, and should be freed up after you finish the install. you can also uninstall once you're done) (and small side note that I just discovered, if you're running the beta on your aTV, you need the beta version of Xcode)
 
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cooldongle

macrumors newbie
Original poster
Feb 22, 2021
4
0
Disney only broke themselves very recently, it's been since valentines day.

that's not a great way to test for atmos, those channels could be working fine, but the sound designer decided that there shouldn't be anything in them at that point in the show. unless you can actually see a read out, it's really hard to determine what kind of signal it is with 100% certainty.

Sometimes your TV will display the type of audio, My LG will say "Dolby Atmos" or "dolby audio" for regular dolby surround but that's it. for me I have to bring up the info display, then click on that.
it looks like there may be a "display" button on the remote, it's mentioned in the text in the manual, but I don't see it in the pictures.

you can enable a display on the appleTV, which will show you what kind of audio it's playing.
You'll need Xcode on your Mac, it's free, you might need to sign up for a developer account (also free, you don't need anything that's in the paid level). It's a massive download (almost 12GB) so you'll need a fast connection, some time, and a decent amount of space on your drive. By the time it unpacks the installer, and installs the files, it uses over triple the space for a bit (I'd say at least 50GB free on your drive before you start to download, a lot of that is only used during install, and should be freed up after you finish the install. you can also uninstall once you're done) (and small side note that I just discovered, if you're running the beta on your aTV, you need the beta version of Xcode)
that's a great idea, I'll give it a shot since my sony tv doesn't tell me anything about the audio (I only get dolby vision in hdr but no dolby atmos icon popping up, and the soundbar display on the Q900t is about as useless as it gets lol). Thanks for the link. I'll test that on both netflix and disney+ today. maybe just some icon display error on the netflix end. Do you happen to know what the display codec will read if it is atmos? would it be something like eac3 ? I'm guessing all the streaming atmos is dolby digital +, or should I just look at the bitrate as a gauge?
 
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waw74

macrumors 68040
May 27, 2008
3,887
506
so... not that I've looked, I can't seem to make sense of it

I can see what I'm getting in the sonos app
it correctly identifies atmos or not based on what I think should be happening, but...

all of prime and appleTV+ report "qec3"
Netflix reports "ec3 - channels 6"

it doesn't matter what's playing, I get the same thing in the HUD no matter if it's atmos or not.
 
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cooldongle

macrumors newbie
Original poster
Feb 22, 2021
4
0
so after doing some research and also looking at my tv output now. I think apple is calling eac3 (DD+) as qec3 and ac3 (DD) as qac3. my tv is actually getting DD+ from the netflix on my apple tv, not sure why it displays as 5.1 instead of the atmos logo (?) perhaps apple tv only consider dolby trueHD codec as atmos ? (I'm not sure about this, I thought all streaming atmos are encoded in DD+, even the ones you buy in itunes store.) weird.
 
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