Any voice.
Any length.
Three shapes of speech generation — clone a voice in seconds from a short reference clip, render high-quality neutral TTS at faster-than-real-time, or produce hour-long audiobooks and multi-speaker podcasts. All on-device.
Three flavours of synthesis.
Zero-shot cloning for personalised voices, fast neutral TTS for app UI, or long-form for narration and dialogue. Different engines, same on-device stack.
Clone a voice from a short reference clip. Use IndexTTS2 for native MLX cloning with emotion and tempo controls, CosyVoice 3 for transcript-conditioned multilingual zero-shot, Chatterbox Flash for CoreML, or Qwen3-TTS ICL for EN/ZH.
High-quality neutral speech, faster than real-time. Compact bundles for app UI, accessibility, in-app narration.
Audiobook chapters with a consistent narrator, or multi-speaker podcasts up to 90 min with inline speaker tags.