HeyGen Voice 1.0
HeyGen Voice 1.0 is HeyGen's text-to-speech model for spoken audio in 39 languages, with the language detected from the text when none is set. It speaks with a public voice or clones a new one from a single recording, and returns the cloned voice so later requests can reuse it. It suits voiceovers, narration for training and product videos, and localized content.
Choosing a public voice
How to pick one of HeyGen Voice 1.0's 24 public voices for a script, from ad reads and training narration to support lines, wellness audio and announcements.
Cloning a voice from a recording
How to clone a speaker with HeyGen Voice 1.0 from one recording, reuse the voice in later requests through outputs.voiceId, and set expressiveness for a closer match.
Speaking other languages
How to make HeyGen Voice 1.0 speak 39 languages with a public or cloned voice, when to set speech.language, and how to localize with one voice across markets.