How do I fix audio that is out of sync with the picture?

The audio is almost never early — the picture is late. Video processing takes time, and the fix is to delay the sound until it matches.

Where the delay comes from

Every stage that touches the image adds latency: the display’s own processing, motion handling, scaling, and any HDR tone mapping. Sound passes through far less. The result is audio arriving before the frames it belongs to.

The setting to look for

An audio delay or lip sync control, in milliseconds, on whatever is producing the sound. Increase it until a close-up of someone speaking matches. Faces are the most sensitive test; anything else is guesswork.

What to do first, before adjusting anything

Turn off motion smoothing and any heavy picture processing on the display. Both add latency, and removing them sometimes removes the problem entirely.

When the delay goes the other way

Rarely, and it usually means a wireless link in the audio chain — Bluetooth headphones, or wireless rear speakers. There the audio is late, and only a device with a negative delay setting or a lower-latency codec will fix it.

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