Browser Studio components
The browser speech system uses the Kokoro ONNX model and associated browser runtime. Their upstream licenses and any other included dependencies must be respected when distributing or hosting the app.
License notices
The public website already includes a full third-party notices document for the browser Studio, including upstream attribution and license text. That document is part of the distribution notices and should stay available.
Desktop model licenses
Humperdinck may support additional local inference engines and models including Qwen, Piper and other providers. Each model or voice pack may have distinct licensing, attribution, commercial-use and redistribution conditions. Packaging a model or downloaded asset does not itself convey broader rights.
Before distributing builds
Audit every bundled package, engine, voice sample, sound effect and model against its actual license and required notices. Keep copies of required legal text with the installer and update this page when the shipped bundle changes.
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