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
Hi all, I’m having an issue that I haven’t seen discussed in this thread. Basically my C9 always defaults to internal speakers & Optical audio every time I switch on or change source. It’s really annoying because I have to manually go into the C9’s settings and choose ARC. Every time.
I had a similar issue when I first got my CX. Found the fix was easy... I had an optical cable plugged into the CX that I wasn’t actually needed/used. Unplugged it, then all was fine after that. Seems like the CX can detect an optical cable is plugged in and will then default to it (even though the other end of my optical wasn’t connected to anything). I know it’s 7 months since you wrote that, but if you still living with it hopefully that solves it for you.
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
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
For future reference: did you change any settings in Kodi to change the transcoding of DTS from DD to PCM/LPCM?
I would love to know if this fixes the issue. Been holding on upgrading my tv ever since I got the arc.
Where is this firmware available?
I can’t see this firmware version here in Germany.
Regards Hoppel
It’s not available on the website, but if you go to your settings > General > about this tv and click Check update it should see it.
Where is this firmware available?
I can’t see this firmware version here in Germany.
Regards Hoppel
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!
The point is that it has nothing to do with his problem or this thread to begin with. You’re welcome.
Mike010101 has only posted the one question in this thread and to quote his post... "Where is the 'DTV Audio Setting set to auto'?” …
I can’t help it being off topic, that’s something you may wish to address with him, but it’s clear to me that he was merely trying to perhaps check/copy the C9 settings that were working for Zophop.
I was just explaining where he could find that TV setting.
And I explained what it does. I don’t understand your problem here?
The point is that it has nothing to do with his problem or this thread to begin with. You’re welcome.
Mike010101 has only posted the one question in this thread and to quote his post... "Where is the 'DTV Audio Setting set to auto'?” …
I can’t help it being off topic, that’s something you may wish to address with him, but it’s clear to me that he was merely trying to perhaps check/copy the C9 settings that were working for Zophop.
I was just explaining where he could find that TV setting.
The point is that it has nothing to do with his problem or this thread to begin with. You’re welcome.
Mike010101,
DTV Audio is located at “Settings/Sound/Additional Settings"
That’s for Digital TV channels. As in your satellite channels, not your HDMI inputs.
I was just answering the question and pointing out where the TV setting is located on the C9. I don’t have satellite either and there’s only digital TV channels here in the U.K. There’s no analog channels? Anyhow this is the info displayed, concerning the ‘audio output’ if that helps at all.
Digital TV is DTV.
huh...and 
? ...(As stated I was just answering Mike010101’s question as to where the setting is located on the C9 TV).
Mike010101,
DTV Audio is located at “Settings/Sound/Additional Settings"
That’s for Digital TV channels. As in your satellite channels, not your HDMI inputs.
I was just answering the question and pointing out where the TV setting is located on the C9. I don’t have satellite either and there’s only digital TV channels here in the U.K. There’s no analog channels? Anyhow this is the info displayed, concerning the ‘audio output’ if that helps at all.
Digital TV is DTV.
Mike010101,
DTV Audio is located at “Settings/Sound/Additional Settings"
That’s for Digital TV channels. As in your satellite channels, not your HDMI inputs.
I was just answering the question and pointing out where the TV setting is located on the C9. I don’t have satellite either and there’s only digital TV channels here in the U.K. There’s no analog channels? Anyhow this is the info displayed, concerning the ‘audio output’ if that helps at all.
Mike010101,
DTV Audio is located at “Settings/Sound/Additional Settings"
That’s for Digital TV channels. As in your satellite channels, not your HDMI inputs.
Ok, I don't have satellite, so maybe that's why I don't see it there. My set top box is connected to my tv via hdmi
Thank you both
Mike010101,
DTV Audio is located at “Settings/Sound/Additional Settings"
That’s for Digital TV channels. As in your satellite channels, not your HDMI inputs.
Mike010101,
DTV Audio is located at “Settings/Sound/Additional Settings"
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:
PS4:
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!
Where is the 'DTV Audio Setting set to auto'?
I have the 65” C9 also. Are there any lipsync issues with the Arc? I never had any with the beam but can see a lot of people get lipsync issues.
Hi,
I’m running an arc with a 65’ C9 with zero lip sync issues.
Bluray/PS4 fine, built in apps (Netflix, Disney+, YouTube, prime) all fine and sky Q fine.
Thank you 
I've just gone out and bought one. Couldn't resist!
I have the 65” C9 also. Are there any lipsync issues with the Arc? I never had any with the beam but can see a lot of people get lipsync issues.
Hi,
I’m running an arc with a 65’ C9 with zero lip sync issues.
Bluray/PS4 fine, built in apps (Netflix, Disney+, YouTube, prime) all fine and sky Q fine.
I have the 65” C9 also. Are there any lipsync issues with the Arc? I never had any with the beam but can see a lot of people get lipsync issues.
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:
PS4:
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.
This is hugely disappointing. I have the same problem.
The good news is you can drive DD 5.1 by setting the setting manually on the Apple TV. It just sucks that the best TV on the market with one of the best soundbars with the best streaming set top box can’t move between Atmos, 5.1, and 2.0 gracefully.
There seems to be a huge amount of confusion centered around the Sonos arc and dolby atmos compatibility. I recently purchased and arc and sub gen 3. I have an older Samsung TV (2016) that doesn’t have an eARC connection. I figured I’d be able to get a lossy version of Dolby Surround with atmos, but no such luck. I’ve been unable to get the atmos to fire on any system (if there is a fix, please let me know).
I’m thinking of purchasing an LG C9, but wanted to confirm with the community before I pull the trigger.
My setup will mainly get content through an external Apple TV 4K running into the eARC. Will I be able to get Atmos functionality through the AppleTVs Netflix, Prime, and iTunes movie apps?
There seems to be so many different answers, so if anyone can coalesce these answers - It would be greatly appreciated!
The universal fix looks to be this device:
https://www.hdfury.com/product/4k-arcana-18gbps/
It’s only on preorder right now, but the company appears to have a pretty good track record of providing quality products.
My opinion on this would be to play around with your TVs audio config, and your sources to see if it works. If you have older HDMI cables, maybe get updated ones to make sure they are HDMI 2.0. If that fails then get the LG C9 if you want it for the picture quality. Don’t buy a TV for it’s ability to process audio. Get this arcana product instead.
