I’m a little confused. I have an Apple 4K going into a TV that’s older than a few years. Will the Atmos sound from the TV be pushed through the TV via the eARC/eHDMI connection even though Atmos isn’t native to the TV itself?
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Hi there, what FW is your LG running?
(also, why no Chroma 4:2:2?)
I’ve got the most up to date FW on TV (checked this out about 3 times) also had confirmation from LG that my TV is capable of LPCM passthrough.
I get DD 5.1 passthrough from AppleTV when Audio Format is set to Auto with Atmos off. As soon as I enable Atmos on AppleTV it show Atmos Available but I get no sound at all.
LG TV set up with eARC on and HDMI Input as Bitstream and Passthrough enabled.
(Tried all different video settings in Apple TV and still no change to what happens with audio)
Odd that we’re seeing a mix of behaviour.
Like you, I get DD5.1 when ATV is on auto.
I also get Atmos working perfectly when that’s enabled on ATV.
However, with Atmos enabled on ATV any DD5.1 content is output via multi channel LPCM. since the latest LG update it now passes this straight through to the ARC. The ARC cannot process this yet, so I just get a left and right channel.
So, at the moment I have to toggle the audio setting on the ATV based on what I am about to watch!
Hi there, what FW is your LG running?
(also, why no Chroma 4:2:2?)
I’ve got the most up to date FW on TV (checked this out about 3 times) also had confirmation from LG that my TV is capable of LPCM passthrough.
I get DD 5.1 passthrough from AppleTV when Audio Format is set to Auto with Atmos off. As soon as I enable Atmos on AppleTV it show Atmos Available but I get no sound at all.
LG TV set up with eARC on and HDMI Input as Bitstream and Passthrough enabled.
(Tried all different video settings in Apple TV and still no change to what happens with audio)
Odd that we’re seeing a mix of behaviour.
Like you, I get DD5.1 when ATV is on auto.
I also get Atmos working perfectly when that’s enabled on ATV.
However, with Atmos enabled on ATV any DD5.1 content is output via multi channel LPCM. since the latest LG update it now passes this straight through to the ARC. The ARC cannot process this yet, so I just get a left and right channel.
So, at the moment I have to toggle the audio setting on the ATV based on what I am about to watch!
It’s very odd as Apple TV and ARC seem to do different things for different people.
Are you using the HDMI cable that came with the Sonos Arc? I wonder if upgrading to an HDMI 2.1 cable Will make a difference?
Hi there, what FW is your LG running?
(also, why no Chroma 4:2:2?)
I’ve got the most up to date FW on TV (checked this out about 3 times) also had confirmation from LG that my TV is capable of LPCM passthrough.
I get DD 5.1 passthrough from AppleTV when Audio Format is set to Auto with Atmos off. As soon as I enable Atmos on AppleTV it show Atmos Available but I get no sound at all.
LG TV set up with eARC on and HDMI Input as Bitstream and Passthrough enabled.
(Tried all different video settings in Apple TV and still no change to what happens with audio)
Odd that we’re seeing a mix of behaviour.
Like you, I get DD5.1 when ATV is on auto.
I also get Atmos working perfectly when that’s enabled on ATV.
However, with Atmos enabled on ATV any DD5.1 content is output via multi channel LPCM. since the latest LG update it now passes this straight through to the ARC. The ARC cannot process this yet, so I just get a left and right channel.
So, at the moment I have to toggle the audio setting on the ATV based on what I am about to watch!
It’s very odd as Apple TV and ARC seem to do different things for different people.
Are you using the HDMI cable that came with the Sonos Arc? I wonder if upgrading to an HDMI 2.1 cable Will make a difference?
Using Sonos cable at the moment. Can try a full 48gbps 2.1 cable as I have some spares. I don't believe that will help in my case.
The issue with Apple TV content outputting as Stereo appears to be due to the newest LG C9 firmware for LPCM. I’d advise not upgrading to 04.80.03 if your main media device is the Apple TV until Sonos patch in LPCM for the Arc.
Most people probably have auto update (me included)
I do have a copy of the previous firmware though, so may see if the TV will flash this via the USB port.
Very odd.
Same TV OS, same input device, same settings, should = same result.
CX runs WebOs 5 and I am currently on the .60 release although others are reporting that they are running .70.
I have auto update turned off.
The cable to the Arc is the one that came in the box.
The cable from the ATV is nothing special (amazon basics range)
Grasping at straws a little, but have you tried connecting the ATV to a different HDMI port on the TV?
Another TV setting that may have an impact on things is the DTV Audio setting, mine is set to Auto.
Last setting to check on ATV
I have the LG 65SK9000PUA with ARC connection and I get Dolby Atmos fine (Disney+ & Apple+) except with Netflix (ATV4K). I’ve only tried it with the movie Underground 6. I have the Arc with two Sonos Ones behind the couch. It seems the audio gets confused in to where it should be coming from and will crackle and drop out from the rear Sonos Ones and sometimes the main dialogue will come through the rear speaker. My setup is ATV4K>LG>ARC. Atmos comes through perfect from the LG apps (Netflix & Disney+). I’m not using the HDMI cable that came with the ARC, not long enough to run through the wall to connect both. Thinking of trying the cable that came with it to see if there’s a difference.
Hi all,
Received my Arc today. I can confirm you can use the Sonos Arc with 4K Apple TV. The Arc is plugged into the eARC port on my 2019 LG OLED, I can successfully watch movies from iTunes with fully Dolby Atmos.
Disney plus however seems to be a problem on both the Apple TV and native app on the LG TV. I get audio, but not Dolby Atmos. Netflix works perfectly fine too with Atmos.
Really??? My new LG 75NANO90UNA has EARC which I have connected to the Sonos Arc, I have tried all settings on the tv ate arc and ATV, currently passthru on lg tv and ATV set to Dolby Atmos, and so far I have not been able to get the arc to play any sound when the movie is Atmos, it plays the theme music when on the menu for the movie but as soon as I hit play there is not sound at all. So I totally feel that the arc. cannot process the Atmos signal being send thru the LG tv by ATV (MAT) to it. When I use Netflix on the tv app and play an atmos show (Space Force) it works perfectly, but does not for the LG appletv+ app which apparently does not support atmos at the moment but LG states it will, hopefully on their next update. This is totally frustrating to not have Sonos accept the signal from so many set top boxes like ATV. ! The only thing that gives me hope is that Sonos has stated they will update Arc to accept LPCM, again hopefully soon. As an aside the Sonos app shows the dolby
Really sad to see how Sonos dint really learn from it’s experience with the Playbar and later the Beam.
I haven’t bought a an Arc myself so of course cannot ad anything in terms of possible remedying this issue but I do recognize the years of frustration from working with all of previous Sonos soundbars.
Best advice when buying Sonos for home theater is to plug them in, lean back and enjoy whatever comes out of the speaker. Just hope that whatever setup you have will give you the best the speaker has to offer but don’t ever check the Sonos app for confirmation - that will likely lead to frustration and a long road of frustration end expenses to maybe get things working the way they should.
As always: if you care about what codec you are getting, Sonos really isn’t for you unless you buy a third-party receiver with support for Works with Sonos.
Seems a very mixed bag of results at the moment, hopefully the arc update isn’t far off, can only imagine those with a lesser interest in the forums etc purchasing an arc and thinking it’s faulty.
Like many I have a C9 which has updated to the the latest FW, I do get Atmos from ATV4K on supported movies, but, anything outside that and any app run from ATV that requires 5.1 does not output any dialogue, so it’s ATV for movies & C9 internal apps for anything else.
Seems a very mixed bag of results at the moment, hopefully the arc update isn’t far off, can only imagine those with a lesser interest in the forums etc purchasing an arc and thinking it’s faulty.
Like many I have a C9 which has updated to the the latest FW, I do get Atmos from ATV4K on supported movies, but, anything outside that and any app run from ATV that requires 5.1 does not output any dialogue, so it’s ATV for movies & C9 internal apps for anything else.
How are you getting atmos from the arc thru your tv to the arc I guess your lg has a different software that works better with arc to get the signal to the arc any insight would be gelpful
Hi. What TV have you got? The LG C9 has earc and supports ATMOS pass through, so movies I’m playing off the Apple TV will pass ATMOS to the Sonos, but, due to the recent LG firmware update to support LPCM, it’s stuffed the delivery of any content like DD5.1 from the ATV to include vocals as the Sonos can’t process it.
I’ve not made any changes just had to use ATV for only Atmos movies & TV apps for everything else (Netflix etc on the tv will also play Atmos if it’s included so it’s all a mixed bag really.
Seems a very mixed bag of results at the moment, hopefully the arc update isn’t far off, can only imagine those with a lesser interest in the forums etc purchasing an arc and thinking it’s faulty.
Like many I have a C9 which has updated to the the latest FW, I do get Atmos from ATV4K on supported movies, but, anything outside that and any app run from ATV that requires 5.1 does not output any dialogue, so it’s ATV for movies & C9 internal apps for anything else.
How are you getting atmos from the arc thru your tv to the arc I guess your lg has a different software that works better with arc to get the signal to the arc any insight would be gelpful
Hi. What TV have you got? The LG C9 has earc and supports ATMOS pass through, so movies I’m playing off the Apple TV will pass ATMOS to the Sonos, but, due to the recent LG firmware update to support LPCM, it’s stuffed the delivery of any content like DD5.1 from the ATV to include vocals as the Sonos can’t process it.
I’ve not made any changes just had to use ATV for only Atmos movies & TV apps for everything else (Netflix etc on the tv will also play Atmos if it’s included so it’s all a mixed bag really.
HDR
Model:75NANO90UNA which has EARC on one of the hdmi. I have the Sonos Arc connected to that and the ATV to one of the. other HDMI 2.1 inputs. Mine must have something in the lg that stops it sending the signal to the arc as if I try an Atmos movie from ATV there is not sound unless I go to the top menu for the movie with extras then. it plays the theme music but again once I start the movie and look at the Sonos app it states silence, at least they got that right it is silent lol. I know it works with the Netflix and amazon prime on my tv and when I look at the Sonos app on iPhone. it has Dolby Atmos as the input.
Again I guess my tv has a different piece of software than yours that works.
Hi, Hmmm...sounds odd then as logically with earc all should be fine regardless of software. I’m sure you have but as another check ensure:
TV, Go to Settings > Sound > Sound Out. There should be some settings for HDMI ARC. Check it is set for ‘Digital Sound Out’ as ‘Pass Through’.
Seems a very mixed bag of results at the moment, hopefully the arc update isn’t far off, can only imagine those with a lesser interest in the forums etc purchasing an arc and thinking it’s faulty.
Like many I have a C9 which has updated to the the latest FW, I do get Atmos from ATV4K on supported movies, but, anything outside that and any app run from ATV that requires 5.1 does not output any dialogue, so it’s ATV for movies & C9 internal apps for anything else.
How are you getting atmos from the arc thru your tv to the arc I guess your lg has a different software that works better with arc to get the signal to the arc any insight would be gelpful
Hi. What TV have you got? The LG C9 has earc and supports ATMOS pass through, so movies I’m playing off the Apple TV will pass ATMOS to the Sonos, but, due to the recent LG firmware update to support LPCM, it’s stuffed the delivery of any content like DD5.1 from the ATV to include vocals as the Sonos can’t process it.
I’ve not made any changes just had to use ATV for only Atmos movies & TV apps for everything else (Netflix etc on the tv will also play Atmos if it’s included so it’s all a mixed bag really.
HDR
Model:75NANO90UNA which has EARC on one of the hdmi. I have the Sonos Arc connected to that and the ATV to one of the. other HDMI 2.1 inputs. Mine must have something in the lg that stops it sending the signal to the arc as if I try an Atmos movie from ATV there is not sound unless I go to the top menu for the movie with extras then. it plays the theme music but again once I start the movie and look at the Sonos app it states silence, at least they got that right it is silent lol. I know it works with the Netflix and amazon prime on my tv and when I look at the Sonos app on iPhone. it has Dolby Atmos as the input.
Again I guess my tv has a different piece of software than yours that works.
Hi, Hmmm...sounds odd then as logically with earc all should be fine regardless of software. I’m sure you have but as another check ensure:
TV, Go to Settings > Sound > Sound Out. There should be some settings for HDMI ARC. Check it is set for ‘Digital Sound Out’ as ‘Pass Through’.
Yup I just rechecked everything and the HDMI earc is on, the out is passthrough, Atmos is enabled on ATV and the hdmi input for the hdmi that the ATV is connected to is bitstream (I also tried it on PCM ). All results the same no sound when actually playing the movie in Atmos but sound when. its not an atmos movie. I looked at. the app on my phone and it had 2.0 for the input. When everything else is played is states 5.1
Weirdly I just updated the Sonos apps on. my iPhone and MacBook just before this conversation so I really thought perhaps that. update would be support of LPCM
Vizio, based on my discussion with them, will not pass anything other than Dolby Digital from an HDMI input, although some TVs can generate Dolby Digital Plus from internal apps.
I won’t be purchasing another Vizio TV. I am thinking strongly about the device mentioned here until I can afford to replace the TV I purchased 12 months ago.
Tested the Vizio Smartcast built-in apps on my 2018 Vizio P55-F1 last night, and was able to get Atmos on the Arc by using the Vizio apps (e.g. Vudu, Netflix) to play Atmos content instead of the Apple TV.
Of course, these apps suck compared to the Apple TV interface…. but it’s hard to blame Sonos for the problem when multiple other companies (Apple, Vizio) are clearly being obstinate with their software and how it outputs to other devices. At the end of the day, it’s just software standing in the way. The hardware is capable. Ugh.
Many varying experiences here indeed. Reading through this thread while I was waiting for my preordered Sonos Arc to arrive made me really nervous that things just wouldn’t work at all. Luckily I’m happy to report otherwise for my particular setup. I have a LG C8 and ATV 4K (connected using ARC mind you, the C8 doesn’t have eARC) and I’m getting Atmos from Netflix and movies purchased from iTunes — which is what I care about.
I thought I had to upgrade to the C9 that has eARC for things to work properly, and ordered it before the weekend since I found it at a sale for a great price. However, I’m unsure if I actually need it since things seems to be working fine with the C8 and ARC.
What’s weird though, and what I’m having a hard time understanding is that Apple undeniably states that atmos isn’t supported over arc in this article: https://support.apple.com/en-us/HT204069
(“Apple TV 4K uses a high bandwidth form of Dolby Atmos that doesn’t work over ARC connections.”)
I mean, I’m definitely not complaining that it works for me! I just don’t completely understands the workings here and what’s really going on. As I see it there are 3 possible options:
- The article from Apple is outdated and they now support Atmos over ARC.
- The Sonos app is being tricked somehow into thinking that it's getting an Atmos signal, when it in fact isn’t.
- The LG C8 is doing some sort of voodoo magic to make it all just work.
No idea if any of the these are true, or if something else is going on. But for now I’ll just enjoy the content I guess :)
Are you able to get the Apple TV 4K to play Dolby Atmos through the internal LG 75NANO90UNA TV speaker? I disconnected my Sonos Arc to see and all I can get is Dolby Digital on the internal speaker. I could get Dolby Atmos with the Xbox One X on the internal speaker.
When I plug the same Apple TV 4K into my LG OLED55B7D I get Atmos On the internal speaker and also when I connected the Sonos Arc.
I am just wondering if this is a problem with the 75NANO or if it is related to the firmware. I would expect we at least get Atmos on the internal speaker with the Apple TV 4K. This is so frustrating.
Apple says the Apple TV will not pass Atmos (even compressed to DD+) over HDMI Arc. Apple requires eARC. “Apple TV 4K uses a high bandwidth form of Dolby Atmos that doesn’t work over ARC connections.” https://support.apple.com/en-us/HT204069
That’s a limitation Apple has imposed.
Apple says the Apple TV will not pass Atmos (even compressed to DD+) over HDMI Arc. Apple requires eARC. “Apple TV 4K uses a high bandwidth form of Dolby Atmos that doesn’t work over ARC connections.” https://support.apple.com/en-us/HT204069
That’s a limitation Apple has imposed.
Yep, which is why so many of us are eagerly awaiting the HD Fury Arcana to ship. It’s going to be the only real way for most of us TV users to get Dolby Atmos short of buying a new TV.
Agreed. I already bought 1 new TV to get my Sonos Arc fully working (great excuse to get a new LG OLED!)... Really don’t want to replace the other one, which is less than a year old...
I keep seeing people saying that Apple TV 4K only supports Dolby Atmos over eARC. That is not completely correct.
I and several others like me have a brand new 2020 model TVs with eARC. Apple TV 4K doesn’t play sound over Sonos Arc, that means No Sound is coming because Apple TV 4K is transmitting it in LPCM, which Sonos Arc doesn’t support.
Run a search on these forums and you will see the Moderator Ryan has confirmed Sonos is working on adding LPCM but have no ETA to share. I have a new 2020 LG 75 Nano and the Sonos Arc bought together and the only way I get ATMOS is playing over the built in LG apps of Apple TV+, Netflix, Prime and Disney.
You can still use Apple TV 4K but only in Dolby Digital 5.1, which means you need to turn off Atmos in the Apple TV 4K settings.
Now I say at the beginning the you don’t necessarily need eARC. I also have a 2017 LG OLED that supports Atmos. I can take that same above Sonos ARC and same Apple TV 4K and I get Atmos over the Sonos Arc (no eARC on this TV). You might ask what gives? LG issued an update to their LPCM in newer models i.e., 2019, 2020 which I guess is the root of the LPCM issue, because the LG is, I guess again, no longer decoding the Apple TV and passing LPCM straight through to Sonos Arc, which does not support LPCM until a software fix becomes available (if).
As to whether the Fury dongle which many are posting about works, I have no clue about and I don’t like adding another element in the mix. For me I will abandon the Apple TV 4K and use the internal apps as mentioned which support Atmos. Not my preference, but at least I get what I paid for in a new TV and new soundbar….Dolby Atmos. I truly hope Sonos does the update as moderator Ryan states.
I keep seeing people saying that Apple TV 4K only supports Dolby Atmos over eARC. That is not completely correct.
I and several others like me have a brand new 2020 model TVs with eARC. Apple TV 4K doesn’t play sound over Sonos Arc, that means No Sound is coming because Apple TV 4K is transmitting it in LPCM, which Sonos Arc doesn’t support.
Run a search on these forums and you will see the Moderator Ryan has confirmed Sonos is working on adding LPCM but have no ETA to share. I have a new 2020 LG 75 Nano and the Sonos Arc bought together and the only way I get ATMOS is playing over the built in LG apps of Apple TV+, Netflix, Prime and Disney.
You can still use Apple TV 4K but only in Dolby Digital 5.1, which means you need to turn off Atmos in the Apple TV 4K settings.
Now I say at the beginning the you don’t necessarily need eARC. I also have a 2017 LG OLED that supports Atmos. I can take that same above Sonos ARC and same Apple TV 4K and I get Atmos over the Sonos Arc (no eARC on this TV). You might ask what gives? LG issued an update to their LPCM in newer models i.e., 2019, 2020 which I guess is the root of the LPCM issue, because the LG is, I guess again, no longer decoding the Apple TV and passing LPCM straight through to Sonos Arc, which does not support LPCM until a software fix becomes available (if).
As to whether the Fury dongle which many are posting about works, I have no clue about and I don’t like adding another element in the mix. For me I will abandon the Apple TV 4K and use the internal apps as mentioned which support Atmos. Not my preference, but at least I get what I paid for in a new TV and new soundbar….Dolby Atmos. I truly hope Sonos does the update as moderator Ryan states.
Do you get Atmos through Netflix on your OLED? I understood Netflix Atmos was an Apple TV exclusive. Not true?
I’ve read some rumors about it being dependent on the TV set too, some TVs will pass the Apple TV’s data, some won’t. I’m anxious to see if my Vizio’s will. And keeping my eye open on potential HDMI switches that will generate an eARC signal, so I can get TrueHD signals to the Arc.
Take a peek at this….
I have pre-ordered one 👍
Hi everyone. I also bought the new LG 75NANO90UNA and Atmos does not work through Apple TV with Sonos Arc. I tried everything and then decided to check the forums..thought I had a bad TV. Whew., I normally don’t use the apps that come with the tv but I read that Netflix app on LG TV supports ATMOS if you have the Ultra HD plan….I set it up and it works with the ARC. So I am just going to disconnect the Apple TV 4K until Apple and Sonos fix this. I have been an Apple and Sonos user for a long time and it is really getting old when they say it supports „this“ and it doesn’t. Anyway I hope they correct soon.
From a network security standpoint, I would not. Connected TVs are just crap piece of software!!!
i would rather watch movies in stereo mode with the ATV rather than compromising my whole network security by connecting the TV...
Thanks! I’d love to upgrade to the the Arc but was unsure of my potential benefits. My Beam is underpowered for the room and my Playbar is under-featured.
Yes, my TV has HDMI-ARC but not eARC.
With the Apple 4K, this will be an excellent addition then. Thanks for the reply.
Personally I would settle for less features and stick with the Playbar. That’s what I’m doing. Having auditioned the Arc I think it’s disproportionately large and I’m less than convinced with the sound output. It sounds harsh and lacks the richness of the Playbar.
I love Sonos but this issue really annoys me and means there is no point me upgrading to the ARC.
I wouldn't mind if,
1. They hadn't had the same issue with pass through from devices to TV to Beam and could have learned a lesson,
And
2. It is soooooo easy to fix, put an HDMI input on your sound bars! Did this never get discussed around the design table? It would solve so many issues in the sound delivery chain.
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