What is voice cloning

Definition

Voice cloning is technology that recreates a specific person’s voice from an audio sample, then synthesizes text in that voice. Where stock text-to-speech picks a voice from a catalog, cloning reproduces a particular voice. On the current Speechify API, consent is captured by recording the speaker reading an issued challenge phrase.

How it works

You supply an audio sample and a verified consent recording, and the system creates a voice you use by ID. Zero-shot cloning uses 10-30 seconds of clean speech without a fine-tuning run and is self-serve on paid plans. Professional cloning fine-tunes on hours of a speaker’s audio and is arranged with our team. After creation, you synthesize with a supported model and the voice ID.

Why consent matters

A voice is personal, so cloning it needs authorization. Responsible cloning makes consent a requirement, not an afterthought. On the Speechify Build API the consent record is mandatory on every create call, so a voice is only ever cloned with permission. See the ethics page.

What it’s used for

Cloning powers signature narrators for audiobooks and podcasts, dubbing that keeps the original voice across languages, creator tools, game characters, and accessibility. See what voice cloning is used for and how to clone a voice.