What audio format does the voiceover come in?

WAV, which imports into every mainstream editor without a transcode step.

Should I generate the whole script at once?

No. Generate section by section, matching how you will cut. Corrections then touch one file, and you can vary tempo between sections — which is the main defence against long narration sounding flat.

How to add a generated voiceover to a video

Q: Do I have to disclose that the voiceover is AI-generated?

It depends on the platform and jurisdiction, and the rules are changing. YouTube requires disclosure of realistic synthetic content in defined circumstances. Treat honest labelling as the default and check the specific rules for your format.

The generation part takes seconds. Everything that makes a voiceover actually work happens either side of it — in how you split the script and how you bring the audio into the edit.

6 min read · Updated 25 August 2026

This is a workflow guide rather than a tool tour. It assumes you have a video and a script and want narration that fits.

Write and split the script before generating

Split the script the way you will cut the video: one block per scene or section, not one block for the whole film.

Three reasons this matters, all of which you will otherwise discover later:

A correction touches one file rather than requiring a whole regeneration.
You can set a different tempo per section, which is the main thing that stops long narration sounding flat.
The audio files land in your timeline already aligned to the structure you are cutting to.

Generate, and check the specifics

Do one section first and listen to it against the script, checking numbers, names and any words in another language. Once one section is right, the rest usually are — the failure modes are systematic rather than random.

Bring it into the edit

Output is WAV, which drops straight into Premiere, DaVinci Resolve, Final Cut, CapCut, Kdenlive or Audacity with no transcode step. Two practical notes:

Lay narration first, then cut picture to it for explainer and faceless formats. Cutting picture first and forcing narration to fit produces the rushed delivery that gives generated audio away.
Leave the head and tail room. Generated clips start and end tight; add a few frames of handle in the timeline rather than butting them together.

Mixing it so it sits properly

Generated narration arrives clean and consistent, which is a gift and also why it can sound detached from the picture. In your editor:

Duck the music under the voice rather than turning the voice up. Loud narration over loud music is the most common amateur mix.
Add a small amount of room tone or ambience under narration for on-location footage, so the voice does not sound like it was recorded somewhere else — because it was.
Keep levels consistent between sections. Generated audio already is, so any inconsistency you hear is coming from your mix.

Fixing a line later

This is the part that changes how you work, more than the cost does. A wrong figure spotted after publishing means: regenerate that one section in the same voice, drop it into the timeline, re-export. No microphone, no room, no matching your voice from a Tuesday six months ago.

It is the reason to clone your own voice at the start of a project rather than a preset — the voice is still there and still identical whenever you need it again.

Disclosure

Platform rules on labelling synthetic media are changing and vary by platform and by country. YouTube requires disclosure of realistic synthetic content in defined circumstances; other platforms have their own rules, and India's requirements in this area have been evolving. Check what applies to your format and label honestly — a disclosure costs you nothing and a policy strike costs a lot.