Sync Labs lip sync and visual dubbing

Sync Labs (product domain sync.so, API host api.sync.so) is a hosted API and web studio that regenerates a speaker's mouth (and, on newer models, jaw/expression/head) to match a new audio track. It does not generate whole people or scenes: the input is an existing talking-head video (or, on sync-3, a single still face), plus target audio (a file, a hosted URL, or text synthesized through an integrated TTS provider). Everything outside the driven face region — background, body, hair, clothing — is left untouched and composited around the regenerated face. (Documented: sync.so/docs introduction and "how AI lip sync works", verified 2026-07-10.)

Use this skill when the job is: dubbing/localizing a video into another language, re-timing lips to corrected or re-recorded audio (ADR-style), personalizing a base video with per-recipient names, cutting podcast/interview clips with clean lips, or animating a portrait photo from a voiceover. Do not reach for it to generate a face from scratch, to swap identities, or to produce a full avatar from text alone — those are different product categories.

What the models are and how to choose