What is dubbing? Types, cost, and AI dubbing
Dubbing replaces a video's original dialogue with a new voice track in another language. Here is what dubbing is, the main types, and how AI dubbing works.
As far back as 2019, Netflix reported that its investment in dubbing was growing 25% to 35% a year while consumption of dubbed content on the platform climbed more than 120% annually, per The Hollywood Reporter. Dubbing stopped being a niche cost and became the default way global audiences watch.
Dubbing is the process of replacing a video’s original spoken dialogue with a new recorded voice track, usually in another language, timed to match the people on screen. sync. labs is an AI dubbing tool that does this in one pass: it translates the line, keeps the original speaker’s voice, and re-times the lips to the new audio across 95+ languages, instead of casting a new actor in a studio.
Dubbing replaces the original dialogue with a new voice track
Dubbing swaps out the audio a video was shot with and puts a new performance in its place. The most common reason is language: a show filmed in Korean gets a new English track so viewers who do not read subtitles can follow it. The new voice is recorded and edited to line up with the timing, and ideally the mouth movement, of the person on screen.
That is what separates dubbing from subtitles and from voiceover. Subtitles leave the original audio alone and print a translation on screen. Voiceover lowers the original track and lays a narrator on top. Dubbing removes the original dialogue entirely and replaces it, so the viewer hears only the new performance. We break the three methods down in detail in AI dubbing vs subtitles vs voiceover.
Dubbing is used across film, TV, streaming, anime, games, and corporate video
Dubbing shows up anywhere content crosses a language border. Streaming drove the recent boom: platforms localize catalogs into dozens of languages to reach viewers who would never watch with subtitles. Anime is dubbed for Western release, films are dubbed for international theatrical runs, and games are dubbed so dialogue matches each region.
It is not only entertainment. Corporate training, e-learning, product marketing, and YouTube creators all dub video to reach audiences in their own language. The goal is the same in every case: let the viewer hear the content in a language they understand without losing the person delivering it.
The main types of dubbing are language dubbing, ADR, and voice-over
Dubbing is an umbrella term, and the version most people mean is language dubbing, but the workflow overlaps with two related processes.
| Type | What it does | When it is used |
|---|---|---|
| Language dubbing | Replaces dialogue with a new voice track in another language | Localizing film, TV, and streaming for foreign markets |
| ADR (automated dialogue replacement) | Re-records dialogue in the same language to fix bad on-set audio or change a line | Post-production cleanup and editorial changes |
| Voice-over | Lays a narrator over a lowered original track, no lip match | Documentaries, news, explainers |
ADR is dubbing in the original language rather than a new one, and it is a standard step in film post-production. We cover it in understanding ADR in content creation. Voice-over is cheaper because it never tries to match the mouth, which is also why it breaks immersion for dialogue-driven scenes.
Traditional dubbing means translating, casting, recording, and mixing
Traditional dubbing is a multi-step studio process, which is why it is slow and expensive. A script is translated and adapted so the new lines roughly fit the timing of the original. Voice actors are cast for each character, then recorded in a booth while watching the footage. An engineer edits and mixes the takes to sit under the picture, and a director checks that the delivery matches the scene.
That pipeline is why studio dubbing runs from about $500 to $5,000 or more per language per video and can take weeks once casting, recording, and mixing are added. It also means the original performance is gone: the voice belongs to a different actor, and the mouth on screen was never moving to those words.
AI dubbing does in one pass what traditional dubbing does in weeks
AI dubbing collapses that pipeline into a single automated pass. sync-3 runs translation, voice, and lip sync together instead of as separate studio handoffs. Voice cloning carries the original speaker’s own pitch, tone, and cadence into the new language, so the dubbed line still sounds like them rather than a stand-in actor.
Because there is no booth, casting, or mixing session, average processing runs under 3 minutes, and you can dub 3 videos a month free with no credit card. For footage with more than one person, active speaker detection ties each voice to the right face. The result keeps the thing traditional dubbing loses: the performer you started with.
Visual dubbing re-syncs the lips, not only the sound
Most AI dubbing tools stop at the audio and leave the mouth moving to the original language, which is the tell that gives dubbing away. Visual dubbing fixes the picture too. sync-3 reads the whole scene, not just the mouth, and re-times the lips to the new audio frame by frame, holding up on side profiles, low light, close-ups, and multiple speakers, at up to 4K and 60fps.
This is the shift we think dubbing is heading toward, covered in the future of dubbing is visual. When the lips match the new language, a dubbed video reads as if it was shot in that language, not translated after the fact.
How traditional dubbing and AI dubbing compare
The right method depends on budget, turnaround, and whether the original performance matters.
| Traditional dubbing | AI dubbing (audio only) | Visual dubbing (sync. labs) | |
|---|---|---|---|
| Turnaround | Weeks | Minutes | Minutes |
| Cost | $500-$5,000+ per language | Usage-based | 3 free/month, then usage-based |
| Keeps original voice | No (new actor) | Sometimes (voice cloning) | Yes (voice cloning) |
| Matches the lips | Depends on the actor | No | Yes (re-synced frame by frame) |
| Languages | Per casting availability | Varies | 95+ |
Cost and turnaround for traditional dubbing reflect standard studio localization ranges; sync. labs speed, free tier, and language coverage are from sync-3 as of July 2026.
Frequently asked questions
What is dubbing in simple terms?
Dubbing is replacing a video's original spoken dialogue with a new recorded voice track, usually in another language, timed to match the people on screen. The viewer hears the new performance instead of the original audio.
What is the difference between dubbing and subtitles?
Dubbing replaces the original audio with a new voice track, so the viewer only hears the new language. Subtitles leave the original audio untouched and print a translation on screen for the viewer to read.
What are the main types of dubbing?
The most common is language dubbing, which replaces dialogue with a new voice in another language. ADR re-records dialogue in the same language to fix on-set audio, and voice-over lays a narrator over a lowered original track without matching the mouth.
Is AI dubbing as good as traditional dubbing?
AI dubbing now matches traditional dubbing on immersion for most content while being far faster and cheaper. Tools like sync. labs also clone the original speaker's voice and re-sync the lips, which traditional dubbing with a new actor cannot do.
What is visual dubbing?
Visual dubbing re-times the mouth movement to match the new language audio. It removes the mismatch between the lips and the dubbed voice, so the video reads as if it was filmed in the new language.
See how sync-3 keeps the speaker’s voice and re-syncs the lips, then dub your first video in the sync. labs AI dubbing tool.