Contributor I

Answered

Beam - TCL (roku) TV sync issues

25 replies
13156 views

Hello, I have a beam connected to the following TV via HDMI (ARC):

TCL - 49" Class - LED - 4 Series - 2160p - Smart - 4K UHD TV with HDR Roku TV

I can NOT get the visuals to synch with the audio (ie lip synch issues).

I have (obviously) tried adjusting the delay under the settings for the Beam on the app, but that only makes it worse.

It renders watching tv/movies unwatchable.

Anyone else experiencing this/any ideas?

Thank you.

George

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Ken_GriffithsAnswer

I'm having the exact same with a TCL 49S405 49-Inch 4K Ultra TV and Sonos Beam connected via ARC HDMI. Have tried changing all the settings in audio for the TV: stereo, Dolby, Dolby + etc etc. Absolutely frustrating that I just purchased both of these products new and the ARC cross-talk is not working. Have tried router reset, unplugging, changing settings. All to no avail - the sound is already playing after the relevant video. When is this going to get fixed?

Rpc12,

The thing is that the Beam TV audio-out is working just fine with so many other brands of TV already.

Quite obviously it's the actual TV that processes the audio and sends it out through the HDMI-ARC port. So it's really whether the TV is doing that in a timely manner for the Beam to then play the audio it receives.

It's perhaps notable that the Beam is already working well with plenty of other TV brands, so this might perhaps be an issue with some TCL TV models and that a firmware/software update maybe required.

I don't think anyone can yet jump to any conclusions, as these things sound like some further investigation maybe required here by both TCL and Sonos.

I doubt anyone can yet say what's causing the lip-sync delay, never mind answering your question of "when is this going to get fixed?' ...simply because these matters are only just now being reported and investigated here.

Presumably some enquiries need to be made with TCL too as it seems other people are reporting similar issues with their TV's and other peripherals... as shown in these few 'example' links below:

https://forums.roku.com/viewtopic.php?t=104465

https://www.oddrealities.com/solving-the-tcl-tv-and-sound-bar-problem/

https://www.oddrealities.com/solving-the-tcl-tv-and-sound-bar-problem/

This one mentions problems with a HDMI control board in the TV...
https://www.bestbuy.com/site/reviews/tcl-49-class-led-4-series-2160p-smart-4k-uhd-tv-with-hdr-roku-tv/5878701

And there appears to be quite a few hits when you search google for 'TCL Roku TV and HDMI-ARC problem'.

melvimbe

One of the solutions I've seen passed around is to look at the TV's audio settings and make sure that it's not doing any processing of the audio signal in anyway. A lot of TVs have different sound modes and such that can add delay to the signal.

Danny

G

gah650Author

Contributor I

@danny - that’s a really great tip. Will try it. Appreciate it.

G

gah650Author

Contributor I

Yeah - that didn’t do it. Unfortunately. I’m surprised this isn’t happening to more people. Those TVs are pretty popular. Anyone from @Sonos have any ideas?

Ryan S

Retired Sonos Staff

Hi George, what sources of video do you notice with this problem? Do you only use apps built into the Roku functions of the TV or do you have any HDMI sources connected that have the same problem?

If possible, have you tried changing the TVs audio output settings to stereo instead of Dolby Digital?

Mark good posts by pressing the like button, and select the best answer on questions you've asked to help others find solutions.

Ken_Griffiths

gah650,

You haven’t mentioned what other devices you have connected to the TV. Anyhow perhaps try this...

Power off the TV and Beam completely and then reboot your router.

Also remove/reconnect the HDMI cable between the TV and Beam... more importantly remove any other devices connected to the TV HDMI ports.

Once router has rebooted, power on the TV, then power on the Beam, but don’t connect any of your other devices to the TV and then try the audio output again and see if it is now in sync.

Let’s see if that works...

Note: Make sure you have put the Beams lip-sync slider-bar back to its default (left side) setting too.

If this fails, then try changing the TV audio output to PCM.

Ken_Griffiths

Sorry Ryan, didn’t mean to interject here, you just beat me to it.

Ryan S

Retired Sonos Staff

Sorry Ryan, didn’t mean to interject here, you just beat me to it.

It's cool, you're asking the right questions 🙂

Mark good posts by pressing the like button, and select the best answer on questions you've asked to help others find solutions.

R

rpc12

Lyricist I

I'm having the exact same with a TCL 49S405 49-Inch 4K Ultra TV and Sonos Beam connected via ARC HDMI. Have tried changing all the settings in audio for the TV: stereo, Dolby, Dolby + etc etc. Absolutely frustrating that I just purchased both of these products new and the ARC cross-talk is not working. Have tried router reset, unplugging, changing settings. All to no avail - the sound is already playing after the relevant video. When is this going to get fixed?

Ken_GriffithsAnswer

I'm having the exact same with a TCL 49S405 49-Inch 4K Ultra TV and Sonos Beam connected via ARC HDMI. Have tried changing all the settings in audio for the TV: stereo, Dolby, Dolby + etc etc. Absolutely frustrating that I just purchased both of these products new and the ARC cross-talk is not working. Have tried router reset, unplugging, changing settings. All to no avail - the sound is already playing after the relevant video. When is this going to get fixed?

Rpc12,

The thing is that the Beam TV audio-out is working just fine with so many other brands of TV already.

Quite obviously it's the actual TV that processes the audio and sends it out through the HDMI-ARC port. So it's really whether the TV is doing that in a timely manner for the Beam to then play the audio it receives.

It's perhaps notable that the Beam is already working well with plenty of other TV brands, so this might perhaps be an issue with some TCL TV models and that a firmware/software update maybe required.

I don't think anyone can yet jump to any conclusions, as these things sound like some further investigation maybe required here by both TCL and Sonos.

I doubt anyone can yet say what's causing the lip-sync delay, never mind answering your question of "when is this going to get fixed?' ...simply because these matters are only just now being reported and investigated here.

Presumably some enquiries need to be made with TCL too as it seems other people are reporting similar issues with their TV's and other peripherals... as shown in these few 'example' links below:

https://forums.roku.com/viewtopic.php?t=104465

https://www.oddrealities.com/solving-the-tcl-tv-and-sound-bar-problem/

https://www.oddrealities.com/solving-the-tcl-tv-and-sound-bar-problem/

This one mentions problems with a HDMI control board in the TV...
https://www.bestbuy.com/site/reviews/tcl-49-class-led-4-series-2160p-smart-4k-uhd-tv-with-hdr-roku-tv/5878701

And there appears to be quite a few hits when you search google for 'TCL Roku TV and HDMI-ARC problem'.

R

rc12

Lyricist III

Ken,

Thanks for the wonderful response - I will be forwarding this thread along to TCL - as I have already started discussions with them about the issue. I think this is a nice summary of the problem and helps narrow down the issue at-hand.

Ryan

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