If the sound on your TV does not line up with the picture, the fix depends entirely on whether the audio is arriving early or late, and almost every guide skips that question. Most lip-sync sliders on TVs and soundbars can only delay audio, never advance it. So if your audio is already late, adding delay makes it worse, and the real fix is removing whatever is holding the audio up. Before touching any slider, run one test: play the same content through the TV's own built-in speakers. What happens there tells you which device to fix.
Step 1: the built-in speaker test
Switch the TV's audio output from the soundbar or receiver back to its internal speakers, and watch a scene with clear close-up speech.
- Still out of sync on the TV's own speakers. The problem is upstream of your audio gear. It is coming from the source device, the app, the broadcast, or the TV's own video processing. No soundbar setting will fix it, and you can stop adjusting the bar.
- Perfectly in sync on the TV's own speakers. The problem was introduced by the audio path: the soundbar or receiver, the connection to it, or the format being sent down that connection. Now the audio device's settings are the right place to work.
This single test splits the problem in half and takes a minute. It is the step the ranking guides leave out, and skipping it is why people spend an evening adjusting a soundbar that was never the cause.
Step 2: work out which way the error runs
Watch a close-up of someone talking and decide which of these you are seeing.
Sound arrives before the lips move. This is by far the more common direction, and it has a mechanical explanation. Modern TVs do a lot of work on the picture: upscaling, motion interpolation, noise reduction, tone mapping. All of it takes time, and the video comes out of the panel later than it went in. The audio path is comparatively quick. The result is audio that leads the picture. This is the case the delay sliders were built for, because delaying the audio to catch up with the video is exactly the correction needed.
Lips move before you hear anything. Audio is late. This happens when something in the audio chain is slower than the video path: heavy sound processing in the bar, a wireless link such as Bluetooth headphones, or wireless rear speakers. Delaying the audio further cannot help. You either remove the source of the delay, or use a video delay control if your equipment offers one, which is uncommon on consumer gear.
Knowing the direction before you open a menu is the difference between fixing this in five minutes and chasing it for an hour.
Step 3: fixes, in order
| Order | Action | Fixes which direction | Cost |
|---|---|---|---|
| 1 | Turn off motion smoothing and picture enhancement on the TV | Audio early | Motion looks less smooth to some eyes |
| 2 | Enable the TV's game or low-latency picture mode | Audio early | Some picture processing is disabled |
| 3 | Turn off audio post-processing on the bar (virtual surround, enhancers) | Audio late | Loses those effects |
| 4 | Use the audio delay / AV sync / lip-sync slider | Audio early only | None, if it has enough range |
| 5 | Change the audio format the TV sends | Either | Can cost you surround, see below |
| 6 | Move from a wireless to a wired audio connection | Audio late | Cables |
| 7 | Power cycle everything, then check firmware on both devices | Either | Time |
Take fixes 1 and 2 seriously before reaching for the slider. Picture processing is usually the single largest contributor when audio leads, and turning it down fixes the cause rather than compensating for it. Compensating with a delay slider still works, but you are now carrying a correction that will be wrong the moment you change source or picture mode.
The lip-sync slider itself is typically found under the TV's sound settings or the soundbar's own menu, labeled Audio Delay, AV Sync, Lip Sync or something close to it. Adjust in small steps and re-test on the same scene each time, because your ear adapts quickly and a scene you have watched five times stops being a fair reference.
Step 4: the format question, and what it costs you
A commonly suggested fix is to change the TV's audio output from Bitstream or Auto to PCM. It does often help, and the reason is straightforward: with bitstream, the TV passes an undecoded surround stream and the soundbar or receiver has to decode it, which takes time. With PCM, the TV decodes it instead and sends finished audio.
The catch is the part the suggestion usually omits. Setting a TV to PCM commonly means the TV downmixes to two channels, so you lose surround and object-based audio at the same time. You have traded lip-sync for the surround you bought the bar to get. That is a real decision, not a free fix, and it deserves to be made deliberately. The tradeoffs on both sides are laid out in bitstream vs PCM.
If you own gear that supports it, the better version of this fix is often to make the audio path shorter rather than simpler: connect sources directly to the receiver or bar where possible, so the audio is not making a round trip through the TV. What the return path can carry, and why it matters, is covered in HDMI ARC vs eARC.
When it is only one app or one source
If the problem appears on one streaming app and nowhere else, the app is the cause, and no equipment setting will properly fix it. Restart the app, sign out and back in, or check whether the app has its own audio sync control, which several do. Broadcast television can also arrive out of sync at the transmission end, in which case nothing at your house is wrong.
If the problem appears on one input only, suspect that source device and its own audio output settings before the TV or the bar.
Related, but not the same problem
Two neighboring symptoms get confused with this one.
If your audio delay is on wireless headphones or earbuds rather than through a TV speaker chain, the cause is Bluetooth encoding and transmission latency, which is a different mechanism with different fixes. The site covers the general case in why is my audio delayed and the video and lip-sync specific case in Bluetooth audio lag when you watch video.
If your sound is not merely out of sync but dropping out entirely or cutting in and out, that is a connection fault rather than a timing one, and the ordered diagnostic path through the whole chain is in the TV sound chain.
What this cannot fix
Some sync error is not correctable at your end. A badly authored stream, a broadcast fault, or content where the audio was mastered slightly off will be wrong on every device you own. The test for that is simple: if the same title is out of sync on your TV speakers, on your phone, and on a different TV, the content is the problem.
Correction sliders also drift. A delay value that is perfect for a streaming app can be wrong for a games console on the same TV, because the two go through different amounts of processing. If you have to keep changing it, that is not a fault, it is the consequence of using a fixed correction on a variable delay. Fixing the underlying processing, rather than compensating for it, is the more durable answer.
FAQ
Why is my TV audio ahead of the picture?
Because the TV's video processing (upscaling, motion interpolation, noise reduction) takes time, so the image reaches the panel later than the sound reaches your speakers. Reducing that processing, or enabling a low-latency picture mode, addresses the cause. A lip-sync delay slider compensates for it.
Why can I not fix audio that arrives late?
Most consumer lip-sync controls only delay audio, they cannot advance it. If audio is already late, adding delay makes it worse. Instead, remove what is slowing the audio down: turn off sound processing modes on the soundbar, or move off a wireless audio link.
Does switching to PCM fix lip-sync problems?
Often yes, because it removes the decoding step from the soundbar. But it usually costs you surround sound, since TVs commonly downmix to two channels in PCM mode. Treat it as a trade, not a free fix.
Only one streaming app is out of sync. What do I do?
Fix the app rather than the hardware. Restart it, sign out and back in, check for an in-app audio sync control, and update it. If the rest of your inputs are fine, changing TV or soundbar settings will only break those.
Should I use a lip-sync setting on the TV or on the soundbar?
Use one, not both. Two corrections stacked on top of each other are difficult to reason about. Pick whichever device has the finer adjustment steps and leave the other at zero.
