Symptoms
- Voices don't match mouth movements
- Delay is worse with some apps than others
- Problem started after adding a soundbar or receiver
- Sync issue comes and goes
Likely causes
- CommonSoundbar or receiver processing delayExternal audio systems add a small delay while processing sound, which the TV needs to compensate for.
- CommonLip-sync/audio delay setting needs adjustmentMost TVs and soundbars have an audio delay setting meant to fix exactly this.
- PossibleApp-specific streaming issueA single app's stream can drift out of sync due to how it buffers video versus audio.
- PossibleOutdated firmware on TV or soundbarSync bugs are commonly fixed in manufacturer software updates.
What to do
- Check if the delay happens on every app and input, or just one, to narrow down where the problem lives.
- Open the TV's audio settings and look for 'audio delay' or 'lip sync' and adjust it in small increments.
- If using a soundbar or receiver, check its own settings for a similar audio/video sync adjustment.
- Try switching the audio connection method (HDMI-ARC versus optical) if both are available.
- Restart the specific app or streaming device if the issue is limited to one source.
- Update firmware on the TV and any connected sound system.
- As a temporary fix, turning off the soundbar and using TV speakers can confirm whether the soundbar is the source of delay.
When to call a pro
This is a settings issue almost every time; a technician is rarely needed unless it happens on every device and setting change fails to fix it.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.