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Guides · Dubbing · 6 min read

How to dub a video with AI voices

Dubbing replaces a video's spoken audio with a new voice in another language — timed to match the original. With AI you can do it yourself: pick a clean narrator voice, keep separate voices per speaker, or even clone the original speaker into the new language.

VoxCaption dubbing a video with AI voice presets

Dubbing vs. subtitles — which should you use?

Subtitles are faster and cheaper, but viewers have to read. Dubbing lets them just watch — far better for tutorials, ads and entertainment aimed at audiences who prefer their own language. Many creators publish both.

Choose the right preset

  • Fast Narration — one clear voice. Best for explainers and voice-overs.
  • Balanced YouTube — the recommended all-round default.
  • Dialogue / Acting — keeps separate voices per speaker for conversations.
  • Cinematic Clone — clones the original speaker's own voice into the new language for the most natural result.

Step by step

  1. Open the Dubbing tab and add your video.
  2. Pick a Mode (start with Balanced YouTube).
  3. Set From / To languages and choose a voice in the target language. Click ▶ to preview it.
  4. (Optional) Turn on Voice Matching to auto-detect male/female or separate multiple speakers.
  5. Preview 30 seconds, then press Start. You get a dubbed video plus editable subtitle files.
Smart Tempo keeps everything in sync: if a translated line runs longer than the original, it's gently sped up (capped at 2× so it never sounds robotic).

Tips for natural-sounding dubs

  • Set the source language explicitly — never use "Auto" for dubbing.
  • Enable GPU if you have an NVIDIA card; it's dramatically faster.
  • Want a premium voice? Plug in your own ElevenLabs key for ultra-realistic narration.

FAQ

Can I keep the background music?

Yes — turn on Audio Ducking to keep original background sounds quietly under the new voice.

How long does dubbing take?

A 10-minute video typically takes 5–15 minutes depending on your PC and the chosen voice engine.

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Related: Translate a video · Text-to-speech voice-over · All guides

Further reading: learn more about the art of dubbing (external).