How to Fix Soundbar Lip Sync on TV

What the audio delay setting does

Lip sync error happens when the audio reaches your ears before or after the matching video frame on screen. The fix is usually an audio delay control, sometimes called AV Sync or Lip Sync, on the soundbar, the TV, or both. The control tells the soundbar or TV to hold the audio back for a short time so sound and picture arrive together.

When the audio is early, increase the delay. When the audio is late, reduce it or look for a video delay control on the source device. Each TV and soundbar brand labels the setting differently, so check the menu on either device. For more detail on how latency builds up, see soundbar audio latency.

Prefer HDMI for fewer lip sync steps

The connection between the TV and the soundbar affects how easy lip sync is to fix. HDMI is the most common home theater audio link, and the specification is maintained by the HDMI Forum and HDMI Licensing Administrator. The HDMI 2.2 specification adds options for higher bandwidth and next-gen Fixed Rate Link technology, part of the larger set of tools licensed devices use to deliver audio and video. Published standards from groups such as the Consumer Technology Association also shape how audio and video products work together.

If your TV has an HDMI ARC or eARC port, use that connection. Read the difference between HDMI ARC and eARC when your TV only labels one port as ARC. TVs without ARC can still use optical, but you may need to set the TV audio output to the correct format. Soundbars with HDMI ARC and eARC cover most modern setups; start with the guide to HDMI ARC soundbars.

Adjust the soundbar first

On most soundbars, the audio delay control lives in the setup menu. Use the soundbar remote to open the menu, then look for a setting named Audio Delay, AV Sync, Lip Sync, or Sound Sync. Play a scene with a close-up of someone talking, pause, make a small adjustment, then resume to check the result. If the soundbar has a built-in test tone, use it to establish a starting point before you play content.

• If the sound arrives early, increase the delay.
• If the sound arrives late, decrease the delay.
• Make one small change at a time and watch the same scene again.
• Try a basic sound mode while testing so extra processing does not hide the result.

Then adjust the TV if needed

Some TVs have their own audio delay setting, often listed under Sound, Expert Settings, or Audio Output. If both the TV and the soundbar offer a delay control, change only one of them. Setting both can add a second offset and make the mismatch worse.

Use the TV control when the TV sends audio to the soundbar and the TV is the first device in the chain. Use the soundbar control when the soundbar receives the signal and performs its own processing. Whichever control you choose, write down the value before you start so you can return to the previous setting if needed.

Check the source device

Streaming sticks, cable boxes, disc players, and game consoles can add their own video processing, which moves the picture independently from the audio. When lip sync is off with one source but fine with another, fix the timing on the source or change its audio output format. Many devices let you choose between sending the original bitstream and sending PCM; switching formats can remove an extra processing step. See TV audio output formats to understand what changes when you switch.

Rule out Bluetooth and sound modes

Wireless connections can add buffering. Bluetooth Classic is the radio used for wireless audio streaming, and it sends data over 79 channels in the 2.4GHz band. If you are troubleshooting lip sync, use HDMI or optical instead of Bluetooth for the test so wireless buffering is not part of the signal path. You can return to Bluetooth after the sync is set.

Sound modes might also change the timing. Surround, up-firing, and room-correction processing can take a little time, so the audio can arrive later than the picture. Try a direct stereo mode during the test. See virtual surround soundbar and soundbar sound modes for how these modes work.

Keep the volume moderate while you listen

A sync test is easier to judge when dialogue is clear, but do not raise the volume to an unsafe level to hear the effect. The National Institute on Deafness and Other Communication Disorders reports that sounds at or below 70 A-weighted decibels are unlikely to cause hearing loss, while long or repeated exposure to sounds at or above 85 dBA can cause hearing loss. Keep the test level comfortable for the length of time you are listening.

When lip sync still does not match

If the delay controls on both devices do not solve the problem, update the soundbar firmware and the TV software. A firmware update can change how the soundbar handles incoming audio. If only one app or player lags, check the audio settings in that app. When every source is wrong, the connection or the soundbar itself is the likely culprit.

For connection problems, review HDMI CEC settings, HDMI ARC versus optical audio, and soundbar no sound troubleshooting. For firmware, see soundbar firmware updates. If you are replacing the soundbar, the site's buying guides can narrow your choices by connection type, channel count, and sound format.

What to pick for your use

Questions

Why is the sound ahead of the picture on my TV?

Video processing in the TV or source device takes slightly longer than the audio path, so the sound arrives first. An audio delay setting holds the sound back so it matches the frame.

Should I set the delay on the TV or the soundbar?

Use one control at a time. In most setups, the device that sends audio to the soundbar or the soundbar itself has the right control. Setting both can add a second delay and make the problem worse.

What is AV Sync or Lip Sync in the soundbar menu?

These are different names for the audio delay control. They all adjust the timing between audio and video so dialogue appears to come from the on-screen actor.

Can Bluetooth cause lip sync problems?

Bluetooth Classic streams wireless audio over 79 channels in the 2.4GHz band, and wireless audio can add buffering. For the most direct timing, connect the soundbar with HDMI or optical while you are troubleshooting.

What if my TV only has audio delay in one direction?

Some menus let you add delay in one direction only. If the audio lags and the control cannot reduce it, try a different source or check the source device for its own sync setting.

Do sound modes affect lip sync?

Yes. Surround, up-firing, and room-correction processing can add time to the audio signal. Try a basic stereo mode to see if the sync improves, then choose the best mode that stays in sync.