Cannot lip sync my television

Factual Questions
1

Title basically says it. My Visio has menus that guide me to Settings > Audio > Lip Sync. The choices are 0-5.

Until about a month ago, if we found the sync to be slightly off, we could always get it looking quite good by using the scale and looking after choosing a setting.

Now, no love. It’s either off or atrociously off. The set otherwise functions perfectly. No power hits. We don’t have cable. We get our signal through the air. The sync issue is across all channels available to us through the air.

Have power-cycled the DVR box that feeds the ingoing signal to the television in case that somehow has altered things. ( that box has a remote, with zero Audio function. )

Any ideas on how I can get this thing back on track? It’s not a “Smart T.V.” at all. Does’t connect to the Interwebs.

2

Have you tried bypassing the DVR and plugging your antenna directly into the TV? Is it any better or worse?

3

I have not, I’m embarrassed to say. Will try that.

4

Is your Visio outputting the audio to an external speaker?

5

I use both the internal and externals.

Power cycled everything. Appears to have done the trick!!

6

My GF has a Visio TV and it has done this too.

You found the audio settings for this.

I would also try turning off any picture enhancements the TV has.

Dynamic contrast, local dimming, motion blur reduction, noise reduction and so on (I do not know what your TV has but turn it all off). These features take up processing power and introduce a lag into the picture. If you have ever played a video game with such settings on the input lag can become apparent.

See if that sorts things out (once the video enhancements are off try the audio adjustment again). If it works then you know where the problem is. Then turn on the enhancement settings you want the most and then in decreasing “I want that” order. Do it one at a time and see if it affects the audio. If the audio gets borked again you know where to back off.

It will take some fiddling (and it may not work at all…worth a try).

If the above does not work try attaching a DVD/Blu-Ray player to the TV and see if that has the same issue as your DVR.

Also, it may be that your DVR has an audio adjustment for this. Maybe poke around in the settings to see.

7

Glad to hear it! Power-cycling tends to be the first recommended fix attempt for this, especially for cable boxes, older-model TVs and the like as they’re usually running older processing hardware/software and get really busy w/ the growing complexity of signal these days. I’ve worked at a few related companies that do this processing and it’s been referred to a ‘Lip Sync’ or ‘Temporal’ processing. I really like the term temporal processing. :slight_smile:

It’s actually somewhat complex (you know, to avoid the whole time paradox destroy-the-universe thing) in decoding the I-, P-, etc frames, decode the various audio streams, and attempt to compensate for all the time-coding to mux everything back together correctly for the display device. With all the embedded software complexities, hitting the Big Red Switch is the modern equivalent of slapping the side of the old tube-based TV to get the picture back.

“I hate television. I hate it as much as peanuts. But I can’t stop eating peanuts.”
— Orson Welles, 1956