How to Fix Lip Sync on TV
When dialogue looks late or early compared with the video, the result is distracting and hard to ignore.
This guide explains how to fix lip sync on TV by checking the most common causes, adjusting the right settings, and isolating the device that is introducing the delay.
Audio-video sync problems can come from the television, soundbar, streaming app, HDMI connection, or even the broadcast itself.
The good news is that most lip sync issues can be corrected without replacing equipment.
What lip sync problems look and sound like
Lip sync issues happen when the spoken audio does not line up with on-screen mouth movement.
The delay may be subtle at first, but it becomes more noticeable in news broadcasts, interviews, live sports, and close-up dialogue scenes.
- Audio is late: You see the mouth move before hearing the words.
- Audio is early: The words arrive before the actor’s lips move.
- Sync changes by app: One streaming service sounds fine while another does not.
- Sync changes by input: Cable TV works, but HDMI streaming does not.
Why lip sync problems happen
Modern TVs process video heavily before displaying it.
Features such as motion smoothing, noise reduction, HDR processing, and upscaling can add video delay, while external audio systems may add their own processing delay.
If the TV and audio path are not aligned, the sound and picture drift apart.
Common causes include:
- AV receiver or soundbar latency: Audio processing takes time, especially with surround sound and wireless speakers.
- TV picture processing: Video enhancement features can slow image output.
- Streaming app buffering: Apps may delay audio and video differently.
- HDMI ARC or eARC issues: Incorrect handoff between TV and audio gear can introduce mismatch.
- Broadcast source delay: Live TV feeds can arrive with built-in timing differences.
- Bluetooth audio: Wireless transmission often adds noticeable delay.
Start with the fastest fixes
Before changing advanced settings, test the simplest corrections.
These steps often solve the problem or at least reveal where the delay originates.
Restart every device in the chain
Power off the TV, soundbar or receiver, streaming box, and modem if needed.
Unplug them for 30 seconds, then reconnect and test again.
A fresh handshake between devices can restore proper synchronization.
Switch to a different input or app
Test cable TV, a built-in streaming app, and an external HDMI device.
If the problem appears only on one source, the issue is likely with that app, box, or cable rather than the entire TV.
Try the TV speakers
Temporarily disable the soundbar or receiver and listen through the TV speakers.
If sync improves, the external audio system is adding the delay.
If the issue remains, the TV or source is more likely responsible.
Adjust the TV audio delay settings
Many TVs include a lip sync or audio delay control in the sound menu.
This setting lets you offset audio so it matches the picture.
The exact name varies by brand and may appear as Audio Delay, AV Sync, Lip Sync, or Digital Audio Delay.
Use small adjustments and test after each change.
If the audio is late, reduce the delay or set it closer to zero.
If the audio is early, increase the delay until voices line up naturally with mouth movement.
- LG: Often labeled AV Sync Adjustment.
- Samsung: Frequently found under Sound Output or Expert Settings.
- Sony: May appear as A/V Sync or Audio Delay.
- Vizio: Commonly listed under Audio Delay or Lip Sync.
- TCL and Hisense: Usually located in audio or advanced sound settings.
If your TV supports automatic lip sync via HDMI, make sure it is enabled.
HDMI lip sync compatibility can help coordinate timing between the TV and connected audio device.
Check soundbar, receiver, or AVR settings
External audio systems are one of the most common sources of lip sync issues.
A soundbar, AV receiver, or home theater processor may have its own delay setting, and it can conflict with the TV’s audio delay.
Review these settings on the audio device:
- Audio delay or sync control: Match it with the TV setting or return it to default.
- Surround processing: Cinema, virtual surround, and DSP modes can add delay.
- Wireless speaker mode: Some multiroom systems introduce extra latency.
- Pass-through mode: If available, this can reduce unnecessary processing.
If the soundbar is connected through HDMI ARC or eARC, confirm that the cable is fully seated and that both devices support the same standard.
Incompatible ARC settings can create timing errors and unstable audio behavior.
Turn off picture processing features
Video processing can slow down the image enough for audio to seem too fast.
If your TV includes motion smoothing or heavy enhancement options, try disabling them one at a time.
Settings to test include:
- Motion smoothing / TruMotion / MotionFlow: Often adds extra video processing.
- Noise reduction: Can increase latency on lower-quality sources.
- Sharpness enhancement: Sometimes delays image rendering.
- Game mode: Reduces processing and may improve sync.
- HDR enhancements: Occasionally affect timing on older models.
Game mode is especially useful for troubleshooting because it reduces input lag and simplifies the processing pipeline.
Even if you are not gaming, it can help determine whether the TV’s picture processing is creating the mismatch.
Inspect HDMI cables and connections
Faulty or low-quality HDMI cables rarely cause lip sync problems by themselves, but unstable connections can lead to handshake issues that affect timing.
Replace any damaged cable, and test a certified High Speed or Ultra High Speed HDMI cable if you use 4K, HDR, or eARC.
Also check:
- Whether the HDMI cable supports ARC or eARC if you are using a soundbar.
- Whether the device is plugged into the correct HDMI port.
- Whether any adapter or splitter is introducing delay.
- Whether the cable run is unusually long or routed through a problematic switch.
Does the problem happen only in streaming apps?
If sync issues appear only in Netflix, Prime Video, YouTube, or another streaming service, the cause may be the app, the streaming device, or the internet connection.
In that case, test the built-in TV app against an external streaming box such as Apple TV, Roku, Fire TV, or Google TV.
Helpful checks include:
- Clearing the app cache or reinstalling the app.
- Updating the streaming device firmware.
- Restarting the router and modem.
- Testing a different HDMI port on the TV.
- Checking whether the app has its own audio sync setting.
Some streaming platforms also serve content with different encoding paths, so the issue may affect only one title or one live channel.
What if lip sync is only wrong on live TV?
Live broadcasts often have more compression, signal processing, and transmission delay than on-demand content.
Sports and news are the most common examples because they are broadcast live and processed through multiple stages before reaching your screen.
If live TV is out of sync but streaming video is fine, the problem may be with the broadcaster, cable box, satellite receiver, or local signal path.
Try switching between channels, testing with a different source, and comparing cable, antenna, and app-based live TV if available.
When to reset devices or update firmware
If basic adjustments do not work, update the firmware on your TV, soundbar, AV receiver, and streaming device.
Manufacturers often release timing and HDMI compatibility fixes through software updates.
A full factory reset is a last resort, but it can resolve persistent configuration conflicts.
Before resetting, note your picture and sound settings so you can restore them later.
If the issue started after a recent update, check the manufacturer’s support pages for known audio sync problems or compatibility notes.
How to isolate the exact cause
A systematic test is the fastest way to pinpoint the source of the delay.
Change one variable at a time and observe the result.
- Test TV speakers instead of the soundbar.
- Test a different HDMI source.
- Test a built-in app versus an external streaming device.
- Disable picture processing features.
- Adjust audio delay on the TV, then on the sound system.
- Replace the HDMI cable if the issue persists.
By the end of these tests, you should know whether the delay is coming from the display, the audio system, the source device, or the broadcast itself.
When the issue is normal and not fixable
Some delay is inherent in modern video pipelines, especially with wireless audio, complex surround processing, or live broadcast delivery.
If every device has a small, consistent offset, a simple audio delay adjustment is usually enough.
If the offset changes constantly, the source may be unstable or the content may be encoded with inconsistent timing.
In that situation, focus on the device most under your control: the TV’s sync setting, the soundbar or receiver delay control, and the HDMI connection path.
Those are the most reliable places to correct lip sync on a TV without guesswork.