Automatic Lip Sync

I recommend that you both go try to buy a TV with support for Automatic Lip Sync. Also, Read the HDMI 2.1 spec. before you do.

Yes, this is NOT Sonos’s responsibility to answer, however it would be a sincere touch of assistance to their valued customer for them to help with the research which will 100% enhance the immersive experience that Sonos it trying to enable and sell equipment for. And --- a market differentiator for their product and their company, if they did. Meaning: Sonos would sell more to a more loyal customer base that would become a source of more and higher profits in the future.

IMHO: Here is the answer that Sonos SHOULD have put forth. It is customer unfriendly, however leaves Sonos with no liability and yet responsive: (My imaginative guess, I am NOT saying that Sonos said anything. As you guys correctly counselled, Sonos will not even point me to a line in their manual.) “Sonos Arc Ultra supports HDMI 2.1 and our interpretation of the requirement for Lip Sync. If the TV has any support for Lip Sync with HDMI 2.1 then the Arc Ultra will process the audio presented to it accordingly.”

That still does not help me, however it is at least an answer.

I am glad that none of you are having lip sync problems.

Thanks,

I don’t think you’ll convince Sonos to change their long standing policy of not recommending third party TVs or other equipment to work with Sonos gear.    They do work have a ‘Works with Sonos’  program about 3rd party equipment that has integrated certain features, but that’s as far as it goes.  Sonos doesn’t want to play favorites, it’s a lot of effort for them to do that job, nor do they have any control or influence on any firmware updates from third party  TV makers. I doubt you’re going to get a different response from other audio companies.

Are you sure that the feature you want in a TV actually exists?  The only way that an automated lip sync can work is if the source, TV, and audio equipment communicate what sort of processing delays they have.  For example, Sonos can communicate to the TV that it takes 35 ms of it to process audio, so the TV can delay video accordingly.  The source can communicate to the TV that there is X delay between audio and video.  if the source doesn’t communicate this, then there is nothing the TV can do.  The TV can’t analyze the video is ms and figure out which audio belongs to which actions in the video  and determine what adjustments to make. I seriously doubt that your source devices are going to accurately provide a lip sync adjustment factor for every channel/network, etc.  Perhaps AI will be able to do this one day, but I don’t think it’s close to that capability right now.

I swore I wouldn’t do this, but I’ll attempt to help again.  My brother had Sharp TVs in both his living room and bedroom that were notorious for lip sync issues, with both a Comcast cable box and a streaming device.  He was constantly turning the TV on/off to temporarily fix it, but it always came back.  When he switched to Samsung, lip sync on his devices was perfect. 

Well, I am done. I leave you with this clip from CoPilot. Yes, I am aware sometimes CoPilot gets it wrong.

What AV equipment supports automatic lip sync?

Automatic lip sync is a feature that helps synchronize audio and video signals to ensure they play in perfect harmony. Here are some AV equipment options that support automatic lip sync:

1. AV Receivers: Many modern AV receivers, such as those from Marantz, Yamaha, and Denon, support automatic lip sync through HDMI ARC (Audio Return Channel) and eARC1.

2. Soundbars: Some soundbars, like the Sonos Arc and Bose Soundbar 700, offer automatic lip sync correction.

3. Smart TVs: Certain smart TVs from brands like Samsung, LG, and Sony come with built-in automatic lip sync features, especially those with HDMI eARC support.

4. Streaming Devices: Devices like the Nvidia Shield Pro and Apple TV 4K also support automatic lip sync when connected to compatible AV receivers and TVs2.

Also, it is addressed in the 2.1 spec., which is difficult to find. But I give up. Thanks for your time trying to change my mind. I appreciate it.

HDMI 2.2 “disambiguates” lip sync issues into manual and automatic. “LIP” --- Latency Indication Protocol (2.2) does what is needed if you really have a lip sync problem.

Jinkees, Samsung TV’s with eArc often support automatic lip sync, as do Sonos soundbars.  If only someone had recommended a Samsung TV that uses eArc w/ a Sonos soundbar in this thread. 🙄

None of this contradicts what you were told.

This new spec was announced 2 days ago, and obviously isn’t in any products yet.