Guides
Speech to speech: keep your performance, change the voice
The only reliable way to get feeling out of a machine voice is to supply the feeling yourself.
Last checked 2026-08-14
In short
Speech to speech takes a recording of you saying the line and re-voices it as somebody else, keeping your timing, emphasis and emotion. It is the right tool whenever the delivery matters more than the words - and the only one that gets sarcasm, grief or comic timing out of a synthetic voice. On Naadly it is on paid plans and runs on the same catalogue of 1,481 voices.
Why it beats text to speech for performance
Text to speech has to guess how a line should be said. Speech to speech does not have to guess: you have already said it. Everything except the timbre survives the conversion - where you slowed down, what you leaned on, the breath you took before the punchline.
The practical use is not novelty. It is an in-house voice-over that sounds directed, a temp track that keeps the edit's rhythm, consistency across a series recorded by different people, and dubbing where the original performance is the whole point.
Recording the reference
- Act it properly. A flat reading converts into a flat result - the model is faithful, which is the point.
- Keep it clean and close. Room echo and background music confuse the conversion.
- Match the length you need. Conversion preserves duration, so if it has to fit 4.2 seconds of video, say it in 4.2 seconds.
- One take per line. It is easier to redo a line than to fix it.
Choosing a target voice
Conversion works best between voices of similar range. A deep male reference into a bright young female target will work and will sound processed; a small move sounds invisible. Filter the catalogue by gender and pitch, preview two or three, and convert one line into each before committing to a series.
What it does not fix
Your mistakes. A mumbled word stays mumbled, a wrong emphasis stays wrong, and a mispronounced name stays mispronounced. It also does not make you anonymous - the audio is watermarked and logged like every other render, and using it to impersonate a real person is against the acceptable use policy and, in many places, the law.
Step by step
- Say the line, properly Record yourself acting it, close to the mic, in one take, at the length the edit needs.
- Pick a target voice Something in a similar range. Preview it reading anything first.
- Convert Upload the take, choose the voice, render. The timing you recorded is the timing you get.
- Compare against text to speech Render the same line as text to speech and listen to both. For neutral narration, text to speech usually wins on cleanliness; for anything with feeling, the conversion wins.
Questions
- Is a voice changer the same as voice cloning?
- No. Cloning makes a new voice from a reference and then reads text in it. A voice changer converts a specific recording into an existing voice, keeping your performance.
- Does it work in real time?
- Not on Naadly - renders take a couple of seconds per line, which is fine for production and no use for live streaming.
- Can I use it to hide who I am?
- The output is watermarked and logged, and impersonation is prohibited. Use it for production, not for anonymity.