Lip sync is the process of aligning dubbed dialogue with the mouth movements, timing, and emotional delivery of the original on-screen speaker. In audiovisual localization, it requires careful script adaptation because translators must balance semantic accuracy with phonetic and rhythmic constraints, paying attention to open vowels, bilabial sounds, and pauses, so the replacement speech feels natural rather than mechanically fitted to picture.
Lip sync is central to dubbing workflows for animation, film, and game cutscenes. After translation, adapters or directors create a dub script that marks timing and phonetic cues; voice talents then record while audio engineers and reviewers check sync against the picture, requesting retakes whenever mouth movements, pauses, or emotional emphasis fall out of alignment.
A frequent mistake is matching only syllable count and ignoring mouth shapes. A line with the same number of syllables may still land on the wrong facial expression, especially for open vowels or consonant-heavy clusters; this makes the dub feel off even when duration is correct and often forces retakes or dialogue rewrites.
For creative and consumer content the failure mode is flatness, not inaccuracy — and flatness passes an accuracy check. Terms here also carry technical constraints (reading speed, character budgets) that are part of the brief.
Angel Translation locks terms like this into a project terminology base before expert review begins, so the same source term resolves to the same target term across every document in a submission — and stays consistent in the next revision. See the 8-step AI + expert workflow.
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