Avid Contributor I

If you're experiencing audio delay issues, read this

551 replies
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I've been living with lip sync issues (audio behind the video) since I got my Playbar about a year ago but I finally decided to do something about it. After multiple conversations with Sonos support and the LG's support people (they kept blaming each other for the audio delay), I decided to email Sonos' CEO about the issue.

After a few hours, I got a reply back from him, CCing a team manager who was going to look into the issue. We scheduled a call and he had me send various diagnostics to him. He said that the engineering team was going to investigate and get back to me.

A week later, I got an update. He told that they are still working on the issue. He also said that only one other person had reported the same issue (I assume that means that only one other person with an LG TV). So, if you're having audio delay issues and you've tried all other troubleshooting, reach out to Sonos support and have them look into it. If it helps you might mention my reference number, which has already been escalated:

Keep in mind that my setup is pretty straight forward (LG C6 OLED TV connected directly to the Playbar via Optical, audio playing from the built-in apps) and every single thing LG and Sonos suggested, including going into the TV's service menu and changing things there.

I know there are multiple post on the topic so hopefully we can solve at least some of the issues causing audio delay.

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Fullwave2

Lyricist II

I have the C9 as well. @Ken_Griffiths can you give a bit more info on how to set the optical to Pass-Through?

Ken_Griffiths

The HDMI switch referenced in the previous post is an automatic switch. I have two DVRs to connect and while I am watching one, the other may turn on to record a schedule recording. I don’t want the switch automatically switching to that DVR so need to use an HDMI switch/extractor that has manual switching capability. Has anyone had success with a manual HDMI switch which works with the playbar and the LG (C9 in my case) solving the lipsync issue?

I would think any manual audio splitter/extractor that supports pass-thru/5.1 or 2 channel and ARC will work .. here is an example of a 2x1 that uses a remote, but I’m sure you will find a few others if you look on Amazon and other similar sites…

https://www.amazon.co.uk/Tendak-Switcher-Optical-Toslink-Extractor/dp/B07YD2CLMY

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Fullwave2

Lyricist II

@Ken_Griffiths You mention that setting the optical to Pass-Through also solves the lip sync issue. I have the LG C9. Can you tell me where that setting is? If that works without the need for the switch, that would be great.

Ken_Griffiths

@Ken_Griffiths You mention that setting the optical to Pass-Through also solves the lip sync issue. I have the LG C9. Can you tell me where that setting is? If that works without the need for the switch, that would be great.

Yes, goto the TV Settings/Sounds/Sound out… it will appear when either the 'HDMI-ARC’ or 'Optical' option is selected. Switch the “Digital Sound Out” setting.

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Fullwave2

Lyricist II

@Ken_Griffiths You mention that setting the optical to Pass-Through also solves the lip sync issue. I have the LG C9. Can you tell me where that setting is? If that works without the need for the switch, that would be great.

Yes, goto the TV Settings/Sounds/Sound out… it will appear when either the 'HDMI-ARC’ or 'Optical' option is selected. Switch the “Digital Sound Out” setting.

Perfect!! Thank you.

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ProdanAuthor

Avid Contributor I

FWIW, I still see lip sync delay with pass-through enabled. I have an LG C9 and Sonos Beam connected directly to the TV via the HDMI ARC port.

Ken_Griffiths

FWIW, I still see lip sync delay with pass-through enabled. I have an LG C9 and Sonos Beam connected directly to the TV via the HDMI ARC port.

I assume you are using the v04.70.05 firmware with your TV? See also the following...

I have the same TV (55” version) and not a single hint of a lip-sync issue here. I have the Beam connected over HDMI-ARC with two surrounds (no sub)… and I pass-through the following devices ..

VirginMedia v6 Cable Box
Apple TV 4th gen
Sony PS 3

I also use the TV’s in-built Netflix, Amazon Movies, Now TV and Rakuten TV Apps.. and several others.

I have eARC disabled, I have not enabled HDMI Ultra HD Deep Colour, nor instant game response and my TV is setup using the ‘rtings' calibration settings, as mentioned within the LG forum, using the “Expert (Dark Room)” picture mode.

i know of at least two other Sonos users who have the 65” version of this TV and they have not mentioned that they are having lip-sync issues either.

All is working really well here, so I would suspect you either may have a hardware fault with one of your devices in the setup, an incorrect setting, or you perhaps may want to consider replacing one or more of your your HDMI cables.

LG Customer Support and Sonos Customer Care are perhaps also worth speaking to, if you are unable to resolve the matter. If it’s working for us, then it should be working for you.

Hope that assists.

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bjermyn

Lyricist I

Hi Everyone: This is my first post and I really appreciate all of the suggestions. I have tried to review the most recent tips for my issue. I have the LG 2019 C9 65 inch purchased in June along with a Sonos Playbar, Sub and Two rear portable speakers. One HDMI cable and one optical. Internal TV speakers off. I have set the pass through setting in Optical but still have lip sync issues it seems. I have asked LG for input but they pass it off. I have not contacted Sonos directly yet. Any other suggestions? Thanks in advance. Bruce.

Ken_Griffiths

Hi Everyone: This is my first post and I really appreciate all of the suggestions. I have tried to review the most recent tips for my issue. I have the LG 2019 C9 65 inch purchased in June along with a Sonos Playbar, Sub and Two rear portable speakers. One HDMI cable and one optical. Internal TV speakers off. I have set the pass through setting in Optical but still have lip sync issues it seems. I have asked LG for input but they pass it off. I have not contacted Sonos directly yet. Any other suggestions? Thanks in advance. Bruce.

What TV audio source(s) are you playing when this occurs and what audio format/codec are you passing through the TV? Do you have an audio splitter/extractor you could try to see if this still occurs when you by-pass the TV.. (see the example links below). Are you using the updated TV firmware v 04.70.05?

https://www.amazon.com/AV-Access-Extractor-Splitter-Amplifier/dp/B07D9BNVM1/ref=sr_1_21_sspa

or...

https://www.amazon.com/NewBEP-Switcher-Selector-Extractor-Splitter/dp/B07438WJ8G/ref=sr_1_7

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ProdanAuthor

Avid Contributor I

FWIW, I still see lip sync delay with pass-through enabled. I have an LG C9 and Sonos Beam connected directly to the TV via the HDMI ARC port.

I assume you are using the v04.70.05 firmware with your TV? See also the following...

I’m on v04.70.12, which is the latest in the US. I have HDMI Ultra HD Deep Color enabled since the TV connects directly to the Apple TV 4K. The TV connect via the HDMI ARC port to the Sonos Beam using the bundled HDMI cable (though I tried a Belkin Ultra High Speed HDMI cable as well). Do you have your TV outputting Bitstream or PCM? What are you AV sync settings in the Sound menu? Is the Apple TV outputting Dolby Atmos to the TV?

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