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I have 2 similar TV setups and both experience minor lip sync delays when watching any TV via Apple TV 4K (black box), e.g. Netflix   When I watch using the LG TV’s inbuilt apps, e.g. Netflix, they’re no delays.

I have used SONOS and Apple TV for many years but don’t recall the delay being so noticeable.

I have read many comments about this issue and have tried everything I have come across.  Does anyone know how to fix this problem?

Notes

  • All firmware and software on all devices is up-to-date
  • Audio sync settings have been run on SONOS app, LG TV and Apple TV, including the Apple TV sound calibration and SONOS trueplay.
  • all lip sync settings are set to Zero, however, I need a setting below zero to sync the sound.
     

Primary TV System:

  • LG TV model: OLED65B8STB
  • Apple TV 4K (iOS 18.2)
  • Sonos: all connected via WIFI (wifi 270mbps)
  1. Arc Ultra connect to ARC HDMI port on TV
  2. Sub 4
  3. 2 x One

thank you in advance to anyone that responds to this post.

The real solution - though I don’t think it’s available yet from any manufacturer - is a video delay feature. Lip-sync is an issue for many, not just Sonos users. 
 

Some broadcasters (and even some programs) are worse than others, too, regarding lip sync. 

Hi ​@BlaBlaTron 

Welcome to the Sonos Community!

Sorry to hear of the lip-sync issue you are having.

I recommend that you reboot both the Apple TV and the TV - in the case of the TV, please reboot by unplugging from power for at least a minute.

Ultimately, however, it is the TV’s job to ensure that video and audio are synced - if the above has not helped, I recommend you contact LG for support.

I hope this helps.

Video can be delayed by all kinds of image enhancing features on the TV. You could try to switch those off. See if this helps.

I have always found best to use the native Apps on the LG for best experience, which suggests a Apple TV issue.

Train yourself to look at the eyes and not the lips if you experience lip sync issue you cant resolve, eg live sports/news remote broadcast.

Have you tried turning off frame rate matching on ATV?

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