Lip Sync Delay

I can tell you that I do not notice any delay in my Sonos 5.1 set up. Using a Vizio TV

good for you! Unfortunately here...unacceptable delay.

There usually is a feature to reduce or increase the delay in audio. My LG ? has that feature and it's 5 years old. You may have to fiddle around the advanced menus for this.

I did notice a slight delay when I first setup an used that to reduce the audio delay. Works fine now.

Unfortunately the Sony doesn't have it.

I ended up getting an external hdmi switch that splits the audio so that I can adjust the delay in the sonos. This solves the problem but the setup is now more fiddly and complicated and I will need to get a universal remote to make it at least easier to use the whole system, change inputs from same remote.

The end analysis is that the Sony itself delays the audio slightly and the sonos also delays the audio slightly more because of wifi. The two combined delays add up to unacceptable lip sync problems. If your tv lets you adjust the lip sync delay, as the LG apparently does, then sonos can be used as is, otherwise an external switch and complicated setup is required to use sonos without lip sync problems due to the extra delay imposed by sonos wifi. Buyer beware.

I am happy with the results with the external switch. Not happy about the more complicated setup. Love sonos for listening to music though! For tv, buyers need to beware that depending on the tv, lip sync could become an issue.

I think some people are less perceptive about lip sync. I was at a friends house and he has a Samsung tv of some kind and a speaker bar of some kind and the lip sync was bad. I don't think he even notices but I didn't ask him because I don't wanna draw his attention to it.

Update: I looked into getting a monoprice HDMI switch BUT, my TV is 4K and none of the HDMI switches I found offered 4K passthrough. The other issue is that if I use the switch so that the audio bypasses the tv, then I won't have audio when watching the apps like HBO Go, HULU, and netflix, youtube etc etc that are built into my smart TV.

So I'm back to square one. Any thoughts on what I can do? I just want to be able to watch cable TV and the internal smart tv apps and have the actors's dialogue match up to their lips.

Bottom line #1 is that the wifi Sonos is always gonna have a little more latency then a hardwired soundbar.

Bottom line #2 is that the sony is also introducing a little more audio delay, perhaps, compared to some other TV's and there is no way to adjust it.

The two above latencies add up to unacceptable lip sync, I agree with you.

The monoprice switch solution has been very satisfactory for me since the Sony TV doesn't introduce any delay, now the Sonos actually has to delay it a bit to zero it in, which sonos does provide the ability to adjust...so with the mono price, lip sync is no problem. I'm satisfied.

I also got a logitech Harmony 650 remote which can control all of my devices including the mono price and the sonos and it can make sure to switch inputs on the mono price and makes the whole experience very seamless and easy.

Unfortunately as you pointed out, I can't use the built in sony apps in this configuration. I don't care because I use a ROKU for that stuff.

As far 4k material is concerned, to be honest, I prefer 1080p. I have compared many times between Roku 1080p Netflix and the same movie using the Sony built in Netflix app with 4k material and I actually like the roku 1080p better then the sony built in 4k version. The sony built in netflix app, in my view, doesn't handle motion quite as well as Roku does. The difference in sharpness is barely noticeable on my 65 inch sony and only when you're standing right near the TV. Keep in mind that the sony also has really awesome upscaling that can upscale the 1080p content to 4k resolution and it does make a difference as far as I'm concerned.

So basically I am just using a Roku at 1080p for all my various streaming services and I'm perfectly content with 1080pm material, into the sony's upscaling capabilities.

I know that doesn't answer your question.. Unfortunately I don't know of any good 4k switch, maybe there is one, but that won't help you with the built in apps if you are intent to use those.

There is not much Sonos can do about the issue. Sony should provide a lip sync adjustment parameter in order to dial in the lip sync, but they don't so that's that Sonos can't make the audio any earlier then it already is. Sonos is introducing a bit of wifi delay, no question about it, I think most people don't notice it because its within the level of tolerance, SO LONG AS nothing else is adding any other delay. Unfortunately since the Sony might be adding a bit of delay, between the two, its a problem.

At any rate I am really happy with the monoprice setup...but..as you pointed out...there is no 4k content this way so if that matters to you...I'd consider a different soundbar other then Sonos...

Atlona makes a 4k hdcp 2.2 audio switcher with optical out. It works great for me. Unfortunately, it's not cheap.

the latest sonos update seems to have reduced lip sync delay substantially.

That's interesting. Thanks for the report!