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VIEWING TIPS · 2 MIN READ

When voices and lips do not match: an audio sync checklist.

Investigate IPTV audio that leads or follows the picture using a simple source and speaker comparison before changing delay settings in your player.

By Strong 8K Editorial · · Viewing tips

Viewing tips editorial illustration

Describe which part arrives first

Choose a close-up conversation or another moment where a visible action makes a clear sound. Decide whether the sound happens before or after the matching picture. Note whether the difference stays constant or gradually grows during playback. This is more useful than reporting only that the audio is strange. Restart the same source once and check again at a comparable moment; keep a note of whether the mismatch begins immediately or appears after several minutes.

Compare the speaker path

If you normally use a soundbar or wireless headphones, temporarily test the device or television speakers at a comfortable volume. Keep the same source and player for the comparison. If the mismatch changes, the audio path is worth investigating with the equipment documentation. If it remains, try a second programme. Do not change TV processing, player delay and speaker settings at the same time, because you will lose track of which change influenced the result.

Adjust delay in small reversible steps

Only use an audio timing control if your player or equipment provides one and explains how its positive and negative values behave. Save the starting value, adjust a small amount, then return to the same dialogue. A fixed delay may help a constant mismatch but may not solve drift that increases with time. Check another source before treating a new value as a global setting. A correction that fixes one programme can make an unaffected programme worse.

Share the comparison rather than a guessed cause

Tell support the source, device, player, speaker connection and whether audio leads or follows. Include the comparison with built-in speakers, the effect of restarting playback, and whether other sources have the same issue. A short example timestamp is useful for on-demand content. Keep any delay value you tried in the report so it can be undone if needed. The aim is to locate the part of the setup responsible, not to keep accumulating compensating settings.

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