LG C9 and Sonos Arc

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B
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Hi All, i appreciate I’m certainly in the category of ‘all the gear no idea’ but i took purchase of my LG C9 and my Sonos Arc yesterday. I have the arc connected into HDMI 2 (as this states its ARC) so question number one, is this the correct HDMI port to use? or does enabling eARC convert all HDMI ports to be eARC? I have then tried Netflix, Disney +, Amazon, and SKY UHD, and all are showing as Dolby vison on screen, although through their respective apps, says it supports Dolby ATMOS. Through the Sonos app the ‘now playing’ shows nothing rather annoyingly, just the volume! I have eARC enabled and sound through is auto. Am i doing something wrong? Furthermore my Sonos app wont recognize any device this morning :-(. Restarted all appliances, restarted my router, still nothing. Strangely my Amazon dot is working fine! Any help is much appreciated

its will be a specific port. on my b9 its port 2. then you need to go into sound settings and enable earc and passthrough. Are you using the netfix app on your tv or on a connected device?

N

Morning, just after some advice and didn’t want to create a new thread. Apologies if this is the wrong place.

I have just purchased an LG CX, 

when using the integrated apps the Sonos app is reporting Dolby Atmos (DD+) -  It is my understanding this is lossy?

When using Apple TV 4K apps the Sonos reports Dolby Atmos - Is this total lossless Atmos and should be the preferred choice?

 

Thanks

P

Hi All, i appreciate I’m certainly in the category of ‘all the gear no idea’ but i took purchase of my LG C9 and my Sonos Arc yesterday. I have the arc connected into HDMI 2 (as this states its ARC) so question number one, is this the correct HDMI port to use? or does enabling eARC convert all HDMI ports to be eARC? I have then tried Netflix, Disney +, Amazon, and SKY UHD, and all are showing as Dolby vison on screen, although through their respective apps, says it supports Dolby ATMOS. Through the Sonos app the ‘now playing’ shows nothing rather annoyingly, just the volume! I have eARC enabled and sound through is auto. Am i doing something wrong? Furthermore my Sonos app wont recognize any device this morning :-(. Restarted all appliances, restarted my router, still nothing. Strangely my Amazon dot is working fine! Any help is much appreciated

Hey Paul. Yeah HDMI 2 is the correct port to plug the Arc into. The TV doesn’t show a pop-up when playing Dolby Atmos audio like it does when playing Dolby Vision content when configured using an external speaker/soundbar. What does it report in the app under Settings > System > About My System when trying to watch something on Netflix in Atmos? Also out of curiosity are you using the HDMI cable that came with the Arc?

 

Did you try re-setting up the devices in the Sonos app?

Many thanks for the prompt reply Zophop. Ive actually just tried switching the HDMI cable as i was using the one in the box, but have swapped this out for one that details it has Ethernet, unfortunately still showing as Dolby Vision. Just reset the app now, and no products found. yipee :-(

P

Hi All, i appreciate I’m certainly in the category of ‘all the gear no idea’ but i took purchase of my LG C9 and my Sonos Arc yesterday. I have the arc connected into HDMI 2 (as this states its ARC) so question number one, is this the correct HDMI port to use? or does enabling eARC convert all HDMI ports to be eARC? I have then tried Netflix, Disney +, Amazon, and SKY UHD, and all are showing as Dolby vison on screen, although through their respective apps, says it supports Dolby ATMOS. Through the Sonos app the ‘now playing’ shows nothing rather annoyingly, just the volume! I have eARC enabled and sound through is auto. Am i doing something wrong? Furthermore my Sonos app wont recognize any device this morning :-(. Restarted all appliances, restarted my router, still nothing. Strangely my Amazon dot is working fine! Any help is much appreciated

its will be a specific port. on my b9 its port 2. then you need to go into sound settings and enable earc and passthrough. Are you using the netfix app on your tv or on a connected device?

Thank you, thorugh the tv

Z
Userlevel 2
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Hi All, i appreciate I’m certainly in the category of ‘all the gear no idea’ but i took purchase of my LG C9 and my Sonos Arc yesterday. I have the arc connected into HDMI 2 (as this states its ARC) so question number one, is this the correct HDMI port to use? or does enabling eARC convert all HDMI ports to be eARC? I have then tried Netflix, Disney +, Amazon, and SKY UHD, and all are showing as Dolby vison on screen, although through their respective apps, says it supports Dolby ATMOS. Through the Sonos app the ‘now playing’ shows nothing rather annoyingly, just the volume! I have eARC enabled and sound through is auto. Am i doing something wrong? Furthermore my Sonos app wont recognize any device this morning :-(. Restarted all appliances, restarted my router, still nothing. Strangely my Amazon dot is working fine! Any help is much appreciated

Hey Paul. Yeah HDMI 2 is the correct port to plug the Arc into. The TV doesn’t show a pop-up when playing Dolby Atmos audio like it does when playing Dolby Vision content when configured using an external speaker/soundbar. What does it report in the app under Settings > System > About My System when trying to watch something on Netflix in Atmos? Also out of curiosity are you using the HDMI cable that came with the Arc?

 

Did you try re-setting up the devices in the Sonos app?

Many thanks for the prompt reply Zophop. Ive actually just tried switching the HDMI cable as i was using the one in the box, but have swapped this out for one that details it has Ethernet, unfortunately still showing as Dolby Vision. Just reset the app now, and no products found. yipee :-(

Really bizarre, sorry to hear you’re having so many issues! What version is your C9’s firmware at currently?

B
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Hi All, i appreciate I’m certainly in the category of ‘all the gear no idea’ but i took purchase of my LG C9 and my Sonos Arc yesterday. I have the arc connected into HDMI 2 (as this states its ARC) so question number one, is this the correct HDMI port to use? or does enabling eARC convert all HDMI ports to be eARC? I have then tried Netflix, Disney +, Amazon, and SKY UHD, and all are showing as Dolby vison on screen, although through their respective apps, says it supports Dolby ATMOS. Through the Sonos app the ‘now playing’ shows nothing rather annoyingly, just the volume! I have eARC enabled and sound through is auto. Am i doing something wrong? Furthermore my Sonos app wont recognize any device this morning :-(. Restarted all appliances, restarted my router, still nothing. Strangely my Amazon dot is working fine! Any help is much appreciated

its will be a specific port. on my b9 its port 2. then you need to go into sound settings and enable earc and passthrough. Are you using the netfix app on your tv or on a connected device?

Thank you, thorugh the tv

Yeah i think there is some confusion in labelling. The tv just shows dolby vision BUT when you look on the app its playing ATMOS. Try this with 6 underground (its an atmos film on netflix) then your tv will show dolby vision and the app should show atmos

 

 

P

Hi All, i appreciate I’m certainly in the category of ‘all the gear no idea’ but i took purchase of my LG C9 and my Sonos Arc yesterday. I have the arc connected into HDMI 2 (as this states its ARC) so question number one, is this the correct HDMI port to use? or does enabling eARC convert all HDMI ports to be eARC? I have then tried Netflix, Disney +, Amazon, and SKY UHD, and all are showing as Dolby vison on screen, although through their respective apps, says it supports Dolby ATMOS. Through the Sonos app the ‘now playing’ shows nothing rather annoyingly, just the volume! I have eARC enabled and sound through is auto. Am i doing something wrong? Furthermore my Sonos app wont recognize any device this morning :-(. Restarted all appliances, restarted my router, still nothing. Strangely my Amazon dot is working fine! Any help is much appreciated

Hey Paul. Yeah HDMI 2 is the correct port to plug the Arc into. The TV doesn’t show a pop-up when playing Dolby Atmos audio like it does when playing Dolby Vision content when configured using an external speaker/soundbar. What does it report in the app under Settings > System > About My System when trying to watch something on Netflix in Atmos? Also out of curiosity are you using the HDMI cable that came with the Arc?

 

Did you try re-setting up the devices in the Sonos app?

Many thanks for the prompt reply Zophop. Ive actually just tried switching the HDMI cable as i was using the one in the box, but have swapped this out for one that details it has Ethernet, unfortunately still showing as Dolby Vision. Just reset the app now, and no products found. yipee :-(

Really bizarre, sorry to hear you’re having so many issues! What version is your C9’s firmware at currently?

04.80.03

P

Hi All, i appreciate I’m certainly in the category of ‘all the gear no idea’ but i took purchase of my LG C9 and my Sonos Arc yesterday. I have the arc connected into HDMI 2 (as this states its ARC) so question number one, is this the correct HDMI port to use? or does enabling eARC convert all HDMI ports to be eARC? I have then tried Netflix, Disney +, Amazon, and SKY UHD, and all are showing as Dolby vison on screen, although through their respective apps, says it supports Dolby ATMOS. Through the Sonos app the ‘now playing’ shows nothing rather annoyingly, just the volume! I have eARC enabled and sound through is auto. Am i doing something wrong? Furthermore my Sonos app wont recognize any device this morning :-(. Restarted all appliances, restarted my router, still nothing. Strangely my Amazon dot is working fine! Any help is much appreciated

Hey Paul. Yeah HDMI 2 is the correct port to plug the Arc into. The TV doesn’t show a pop-up when playing Dolby Atmos audio like it does when playing Dolby Vision content when configured using an external speaker/soundbar. What does it report in the app under Settings > System > About My System when trying to watch something on Netflix in Atmos? Also out of curiosity are you using the HDMI cable that came with the Arc?

 

Did you try re-setting up the devices in the Sonos app?

Many thanks for the prompt reply Zophop. Ive actually just tried switching the HDMI cable as i was using the one in the box, but have swapped this out for one that details it has Ethernet, unfortunately still showing as Dolby Vision. Just reset the app now, and no products found. yipee :-(

Really bizarre, sorry to hear you’re having so many issues! What version is your C9’s firmware at currently?

04.80.03 Having turned the ARC off, the tv then shows its playing Dolby vision and Dolby Atmos

Z
Userlevel 2
Badge +1

Hi All, i appreciate I’m certainly in the category of ‘all the gear no idea’ but i took purchase of my LG C9 and my Sonos Arc yesterday. I have the arc connected into HDMI 2 (as this states its ARC) so question number one, is this the correct HDMI port to use? or does enabling eARC convert all HDMI ports to be eARC? I have then tried Netflix, Disney +, Amazon, and SKY UHD, and all are showing as Dolby vison on screen, although through their respective apps, says it supports Dolby ATMOS. Through the Sonos app the ‘now playing’ shows nothing rather annoyingly, just the volume! I have eARC enabled and sound through is auto. Am i doing something wrong? Furthermore my Sonos app wont recognize any device this morning :-(. Restarted all appliances, restarted my router, still nothing. Strangely my Amazon dot is working fine! Any help is much appreciated

Hey Paul. Yeah HDMI 2 is the correct port to plug the Arc into. The TV doesn’t show a pop-up when playing Dolby Atmos audio like it does when playing Dolby Vision content when configured using an external speaker/soundbar. What does it report in the app under Settings > System > About My System when trying to watch something on Netflix in Atmos? Also out of curiosity are you using the HDMI cable that came with the Arc?

 

Did you try re-setting up the devices in the Sonos app?

Many thanks for the prompt reply Zophop. Ive actually just tried switching the HDMI cable as i was using the one in the box, but have swapped this out for one that details it has Ethernet, unfortunately still showing as Dolby Vision. Just reset the app now, and no products found. yipee :-(

Really bizarre, sorry to hear you’re having so many issues! What version is your C9’s firmware at currently?

04.80.03 Having turned the ARC off, the tv then shows its playing Dolby vision and Dolby Atmos

Is your Sonos app showing all your devices yet? I’m assuming you’re running the new S2 app?

H

The bigger problem for me is the lack of support for Dolby TrueHD. It doesn’t seem possible to play any source with that codec...

This works via my Nvidia Shield hooked up on a ARC and LG OLED65C9PLA. The only BIG problem i have DTS MA shows a Stereo 2.0 on the SONOS app, really sucks! Anyone knows how to get that to DD5.1

R
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The bigger problem for me is the lack of support for Dolby TrueHD. It doesn’t seem possible to play any source with that codec...

This works via my Nvidia Shield hooked up on a ARC and LG OLED65C9PLA. The only BIG problem i have DTS MA shows a Stereo 2.0 on the SONOS app, really sucks! Anyone knows how to get that to DD5.1

DTS isn’t supported by LG or Sonos as far as I know.  Good luck with that one!!

But woah.. what source are you playing to get Dolby Atmos TrueHD?  Kodi/Plex/or other app/service?

C

The bigger problem for me is the lack of support for Dolby TrueHD. It doesn’t seem possible to play any source with that codec...

This works via my Nvidia Shield hooked up on a ARC and LG OLED65C9PLA. The only BIG problem i have DTS MA shows a Stereo 2.0 on the SONOS app, really sucks! Anyone knows how to get that to DD5.1

This is the only frustrating thing about the shield and Sonos limitations. 
You can change the accepted audio formats in the shield audio preferences and untick dts, but you’ll get 2.0 stereo. (once Sonos release multi channel pcm I am hoping this will then be 5.1)
You can also change the HDMI pass through to optical in Plex settings, this way you’ll get 5.1, but you’ll lose Atmos and have to change it back every time. 

the only convenient way I have found, not having to change any settings, is to use nvidia for trueHD and Atmos, and the built in Plex app for LG for DTS movies. 

H

Im not using PLEX im using KODI :(

G

Hi,

How can you tell if the ARC is playing dolby true hd , as I presume there will be no dolby Atmos badge in the sonos app?

My setup for shield is

ARC sound bar eARC slot to eARC slot HDMI 2 on C9, with shield connected to HDMI 1 on the C9

For shield plex app, pass through and available audio formats set too Auto

 

I
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On my older TV, OLED65C7P, it works really well. I get Atmos form the native apps and also from AppleTV.

V

Hi guys, new Sonos owner here and I’m having trouble getting Atmos to work consistently.  My ARC + Sub is hooked up to my 2019 LG C9, but I’m not experiencing the same level of success reported by many others.  I can’t seem to find the root cause, so I was hoping for guidance/help.

Here are my results:

Settings: HDMI ARC selected, eARC enabled, and I’ve tried both Passthrough & Auto; firmware: 4.71.25 (before LPCM update I believe).  Also, I did try cycling eARC and passthrough off and then on as suggested earlier.

Internal Apps:

  • Dolby Access: reports Dolby Atmos!
  • Plex: reports Dolby Atmos!
  • Netflix (used 6 Underground but I don’t subscribe to UHD tier): reports  DD+ 5.1
  • Prime (used s1:e1 of Jack Ryan): reports DD+ 5.1

Apple TV 4K:

  • Plex: reports DD 5.1 (no Atmos)
  • Netflix: DD 5.1
  • Prime: DD 5.1

Nvidia Shield (2017):

  • Plex: reports Dolby Atmos!
  • Netflix: DD+ 5.1
  • Prime: DD+ 5.1

Am I missing something? Netflix may be a subscription issue, but I have no idea why Plex isn’t working on the ATV (since it’s working fine via the shield and internal app).  I also don’t have an answer for Prime Video since there aren’t additional streaming tiers.  Any thoughts would be greatly appreciated!! I’d also be happy to start a new post if that’s a better option.

T

Owners of the LG c9 and who have updated to the newest 4.80.xx update:

Are you still getting atmos from a 4k bluray player?  Does a ps4 still send 5.1 audio in games just fine? Do the WebOS apps send out surround and Atmos fine to the Arc after update? I do not own an Apple TV or any other external streaming box so I am trying to figure out if it is safe to update my TV.  Thanks!

H
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Hi,

here I describe my settings for the LG C9, the Nvidia Shield TV with Kodi and the Sonos Arc.

I have a Sonos Arc, a Sonos Sub Gen. 2 and two Symfonisk Lamps.

 

Firmware versions

  • Nvidia Shield AndroidTV: 8.2.1
  • LG OLED C9: 05.00.03
  • Sonos Arc: 12.2.1
  • Kodi 18.9

Settings LG OLED C9

All Settings - Sound - Sound Out- HDMI ARC:

  • Digital Sound Out: Pass Through
  • eARC: On

Settings Nvidia Shield TV Android

Settings - Device Preferences - Display & Sound - Advanced sound settings:

  • Dolby audio processing: enabled
  • Select formats: Auto

Settings Kodi

System Settings: Expert

Dolby movies (Dolby Digital, Dolby Digital Plus, Dolby TrueHD, Dolby Atmos) work with both of the follwoing described variants:

a) With the following settings your DTS movies get transcoded to Dolby Digital:

System Settings: Audio:

  • Number of channels: 2.0
  • Allow passthrough: enabled
    * Dolby Digital (AC3) capable receiver: enabled
  • Enable Dolby Digital (AC3) Transcoding: enabled
  • Dolby Digital Plus (E-AC3) capable receiver: enabled
  • DTS capable receiver: disabled
  • TrueHD capable receiver: enabled
  • DTS-HD capable receiver: enabled

You have to configure “Number of channels: 2.0” regardless of your setup. This is a Kodi workaround to get the transcoding option. You don’t see this option if you configure something else. 5.1 works this way.

b) With the following settings you get LPCM for your DTS movies:

System Settings: Audio:

  • Number of channels: 5.1
  • Allow passthrough: enabled
  • Enable Dolby Digital (AC3) Transcoding: enabled
  • Dolby Digital Plus (E-AC3) capable receiver: enabled
  • DTS capable receiver: disabled
  • TrueHD capable receiver: enabled
  • DTS-HD capable receiver: enabled

Hope this helps you to get this working.

 

Best regards Hoppel

H
Badge +1

I saw that there are some mistakes in my last post, but it’s not possible to edit it anymore. Please delete that post! Thanks! Here are the correct information.

-------

Hi,

here I describe my settings for the LG C9, the Nvidia Shield TV with Kodi and the Sonos Arc.

I have a Sonos Arc, a Sonos Sub Gen. 2 and two Symfonisk Lamps.

 

Firmware versions

  • Nvidia Shield AndroidTV: 8.2.1
  • LG OLED C9: 05.00.03
  • Sonos Arc: 12.2.1
  • Kodi 18.9

Settings LG OLED C9

All Settings - Sound - Sound Out- HDMI ARC:

  • Digital Sound Out: Pass Through
  • eARC: On

Settings Nvidia Shield TV Android

Settings - Device Preferences - Display & Sound - Advanced sound settings:

  • Dolby audio processing: enabled
  • Select formats: Auto

Settings Kodi

System Settings: Expert

Dolby movies (Dolby Digital, Dolby Digital Plus, Dolby TrueHD, Dolby Atmos) work with both of the follwoing described variants:

a) With the following settings your DTS movies get transcoded to Dolby Digital:

System Settings - Audio:

  • Number of channels: 2.0
  • Allow passthrough: enabled
  • Dolby Digital (AC3) capable receiver: enabled
    * Enable Dolby Digital (AC3) Transcoding: enabled
  • Dolby Digital Plus (E-AC3) capable receiver: enabled
  • DTS capable receiver: disabled
  • TrueHD capable receiver: enabled
  • DTS-HD capable receiver: disabled

You have to configure “Number of channels: 2.0” regardless of your setup. This is a Kodi workaround to get the transcoding option. You don’t see the transcoding option if you configure something else. 5.1 works this way.

b) With the following settings you get LPCM for your DTS movies:

System Settings - Audio:

  • Number of channels: 5.1
  • Allow passthrough: enabled
  • Dolby Digital (AC3) capable receiver: enabled
  • Dolby Digital Plus (E-AC3) capable receiver: enabled
  • DTS capable receiver: disabled
  • TrueHD capable receiver: enabled
  • DTS-HD capable receiver: disabled

Hope this helps you to get this working.

 

Best regards Hoppel

N
Userlevel 1
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I would love to know if this fixes the issue. Been holding on upgrading my tv ever since I got the arc.

T

Owners of the LG c9 and who have updated to the newest 4.80.xx update:

Are you still getting atmos from a 4k bluray player?  Does a ps4 still send 5.1 audio in games just fine? Do the WebOS apps send out surround and Atmos fine to the Arc after update? I do not own an Apple TV or any other external streaming box so I am trying to figure out if it is safe to update my TV.  Thanks!

Updated yesterday.
 

All I have is the internal apps and Roku, but Atmos is correctly delivered on all.

I know it has been one more day, anything negative about the update yet for you ? Thanks.

M

That seems to be tricky.

I have done a lot of tests with my brandnew LG 9C (updated), an Apple TV4, Fire Cube, SKY Q.

I think there is a handshake problem and a problem with the Apple TV4/MAT.

Short Version:

 

First everything seems to be ok and Atmos worked, Then no Atmos at all. After rebooting everything, Atmos with Netflix worked (TV app, ATV App), amazon and SkyQ also (settings as described at the beginning of this thread),


Apple TV4/Apple TV+ content (See) is also working with Atmos.

But itunes content (1917j worked only for a few minutes, after switching between bitstream and pcm. Then I got only a horrible sound with the German format. English format worked a short time, then only Stereo 2.0 but loud and clear. so I had to switch to Dolby 5.1 in the Apple menu to hear a normal sound (German format),

 

I don’t understand the difference between Apple TV+ and itunes movie content.

 

 

I think there is more than one problem...

S

Hey all, my Arc was delivered this morning and I've had a chance to hook it up to my LG C9 directly via eARC and ran a few tests regarding Atmos and other features.

Built in apps:

  • Netflix - Reporting Dolby Atmos (DD+) for Atmos content.

  • Disney+ - Reporting Dolby Digital Plus 5.1 (though this is likely due to the current throttling taking place in the EU)

  • Amazon Prime - Reporting Dolby Atmos (DD+) for Atmos content.

Xbox One:

  • HDMI Audio set to Bitstream out and Bistream Format set to Dolby Atmos has no delay, finally! Displays Dolby Atmos in Sonos app.

PS4:

  • Like with the Xbox, there's no delay on Bitstream HDMI audio

NVidia Shield Pro:

  • Netflix - Reporting Dolby Atmos (DD+) for Atmos content.

  • Amazon Prime - Reporting Dolby Atmos (DD+) for Atmos content.

  • Disney+ - Reporting Dolby Digital Plus 5.1 (though this is likely due to the current throttling taking place in the EU). After connecting up to a US VPN it's reporting Dolby Atmos (DD+) for Atmos content.

  • PLEX - This is where it gets slightly annoying. Playing TrueHD content it reports Stereo 2.0. Setting Passthrough to HDMI reports Dolby Atmos (TrueHD). For DTS content you need to switch the Passthrough setting to Optical which in turn causes TrueHD to playback in Dolby Digital Plus 5.1.

Apple TV:

  • iTunes Content - Reports Dolby Atmos for Atmos content. Non Atmos content reports Stereo 2.0. With Change Format > On and New Format > Dolby Digital 5.1, I receive Dolby Digital 5.1 from non-Atmos iTunes content. I ran this test using Beetlejuice and Avengers Assemble.

  • Netflix - Reports Dolby Atmos for Atmos content.

  • Amazon Prime - Reports Dolby Atmos for Atmos content.

  • Disney+ - Reporting Stereo 2.0 for all content bizarrely. Setting audio output on the Apple TV to Dolby 5.1 allows all content to playback in 5.1 rather than stereo.

My C9 is running firmware 04.80.03 with the following settings:

Sound Out

HDMI ARC selected

Digital Sound Out set to Passthrough

eARC set to ON

Additional Settings

DTV Audio Setting set to Auto

HDMI Input Audio Format set to Bitstream.

 

If there's anything else I can test or any questions, let me know!

Hi, thanks for the above. One question, have you tried it with Sky Q?  If so, any audio delays?
thank  you. 

D
Userlevel 2
Badge +1

New firmware for LG C9 is out 5.00.03.

could anyone please kindly check if it can output DD 5.1 from Apple TV/switch etc to the Arc? I returned my Arc, so can’t sadly check it:(

 

thank you!

 

Z
Userlevel 2
Badge +1

I've go an lg b9 and when I play something that is Atmos it shows on the tv as playing Dolby vision and then in the sonos app it shows dd+ I don't think that is Dolby Atmos is it?. If I unplug the arc and play the same Netflix prog through the tv speakers it says Dolby vision and underneath Dolby atmos

What device are you play content from?

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