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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Airgetlam

Could not have been a problem of process on Sonos to »translate » the LG signal and to diffuse it on the different speakers?

Not in my opinion, no. To the best of my knowledge, what the PLAYBAR is expecting is the Dolby Digital standard. This is why the PLAYBAR works with so many TVs, it only has to deal with one "standard" signal, and not a signal specific to each kind of TV. So there shouldn't be anything unique about the signal being sent by the LG, it's simply a matter of timing.

In my world, the PLAYBAR is actually a pretty "dumb" device. The only thing it does is take 2 specific types of signals, either stereo (PCM) or Dolby Digital, and do a minimal amount of processing to get it out to the appropriate speakers (the three in the device itself, the SUB and surrounds if they're connected). Not a bunch of processing there.

I do think that some of the issues that have been seen in the past were due to various manufacturers inserting their own special codes added to the Dolby Digital signal so that they could do something special with the manufacturer's soundbars. I would hazard a guess that in some cases, it "broke" the standard that Sonos was expecting, and in other cases, the manufacturers were able to keep it "outside" of the standard, and it had no affect on the Sonos' ability to interpret the signal.

Word of warning, though, fredacqua, this is all entirely supposition on my part. Don't take any of this as gospel, please. It's logical based on the knowledge I have regarding lots of these things, but I'm not an audio engineer of any type. Just a guy making some informed guesses.

Bruce

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delboy.hill

Lyricist I

I’ve just come across this thread. I bought a new LG OLED 55” TV last week and noticed the delayed audio straight away.
Very disappointed. Looking forward to seeing a fix on this thread soon.

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discuit

Lyricist I

Another Sony user chiming in, it’s the same on mine with a PS4 Pro and a 65Xe9305

M

michaelja

Lyricist II

Another Sony user chiming in, it’s the same on mine with a PS4 Pro and a 65Xe9305

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michaelja

Lyricist II

But ok with your TV?
I returned my Playbase yesterday.

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discuit

Lyricist I

I’d never really noticed it before with the TV, but watching bbc 1 breakfast via the sat input (internal) it might be a tiny bit out, but hardly noticeable.

It’s defibately way out with the PS4 pro though

C

camillo777

Headliner I

I was looking at my current TV settings samsung ks8000 55 and noticed audio is already delayed 40 msec by default I guess, I don't remember I touched it.
Audio seems in sync with video (without Sonos).
So this could be helpful, is the TV video decoder already adding some delay?
Do you have the same settings?
Camillo

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michaelja

Lyricist II

Thanks Camillo. Sony and (I think) LG televisions do not give users the option to turn off this audio delay, which seems to be the reason that this problem only affects people with TVs from those manufacturers. The HDMI switch solution seems to work well for some but I can’t find an HDMI switch with an optical cable output that supports HDCP2.2, so I can’t watch anything in UHD if using the switch I bought (which I’ve also now sent back).

K

kaischi

Lyricist II

Thanks Camillo. Sony and (I think) LG televisions do not give users the option to turn off this audio delay, which seems to be the reason that this problem only affects people with TVs from those manufacturers. The HDMI switch solution seems to work well for some but I can’t find an HDMI switch with an optical cable output that supports HDCP2.2, so I can’t watch anything in UHD if using the switch I bought (which I’ve also now sent back).

you can try this one, that should work …
https://www.amazon.de/dp/B071WVXZKY/ref=cm_sw_em_r_mt_dp_U_pZLqBbD44CV46
it's from the german store, but maybe you can get it at your place as well.

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wclifton1

Lyricist I

here is a video of the problem with sync settings -5,-4,-3,-2, and -1. Not only does this range not totally fix the audio delay, but -5 is just as bad as zero! the strangest thing was that -4 was the closest to being in sync, but it still 1/30s delayed.
https://photos.app.goo.gl/j9ynjxUPc6beVSCBA

My setup is LG B7A with Optical Out (Auto format and On link settings)

I bought an ARC HDMI audio extractor from Amazon and it actually did not perform any better:
https://www.amazon.com/gp/product/B012ORQIT8/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

not sure what to try next, besides contacting LG support!

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