Before adjusting an audio-delay control, identify the direction of the mismatch. Does the sound arrive before the mouth moves, or after? Note whether the difference stays constant or grows over time. These observations help avoid applying an offset in the wrong direction.
Use a repeatable scene
For an on-demand title, choose a short scene with clear speech and note the timestamp. Replay it with the same settings. For live TV, compare another channel and record the time. If only one title or feed is affected, a global delay setting may make everything else worse.
Compare audio routes
If you use Bluetooth, a soundbar or a receiver, try the TV or device’s direct speakers where practical. Keep the picture path unchanged during the comparison. A difference between outputs points to the audio route as a useful next area to inspect, without proving a particular device is faulty.
Apply a narrow correction only when appropriate
If the player provides a per-session or per-title offset, record the starting value before testing. Make a small adjustment, replay the same scene and check the direction. Restore the default if the result is worse or the issue does not repeat. Keep a global setting for a consistently global problem.
Your checklist
- Describe whether audio is early or late.
- Compare another title and audio output.
- Record and reverse unsuccessful offset changes.
What to take away
A timestamp, direction and output comparison make lip-sync reports actionable. Avoid compensating for one unusual title by shifting sound across the entire device.