Lip sync describes the timing relationship between picture and sound. A player, television or external audio device may offer a supported delay adjustment, but first determine whether the mismatch affects one source or the whole setup. Make a small reversible change in one place, then compare the same passage. Adjusting several delay controls at once can make it difficult to understand or undo the result.
Why it matters
Lip-sync adjustment changes the relative timing of picture and sound. The correct direction depends on which leads. Preserving the original value and one dialogue reference prevents offsets accumulating, and helps determine whether a useful correction for one source remains appropriate when ordinary viewing resumes on another programme.
Work through the steps
- Compare speech on several ordinary items and identify whether the mismatch follows one source, one external audio path or everything you play.
- Record the current supported delay settings in the player, television and sound device, then choose only one relevant control for a small test.
- Replay the same spoken passage after each adjustment and restore the original value if the change does not improve the intended setup without harming other items.
What to avoid
Adjusting delay without identifying the leading component can make synchronisation worse. Avoid a global correction based on one unusual item before comparing another programme through the same device, output and speaker arrangement with the original timing value available for recovery.
The useful takeaway
Identify the leading component, adjust one supported timing control and compare clear dialogue. Recheck another item before treating that offset as suitable for the whole setup or every programme being watched.
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Published 29 October 2026 · Hot IPTV editorial team · How we write and update guides