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[GitHub Trending] supertone-inc/supertonic

7.4 relevance
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personal
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On-device TTS with ONNX, interesting but not core.

2026-05-18 Open Source github.com
Lightning-Fast, On-Device, Multilingual TTS — running natively via ONNX. - supertone-inc/supertonic
Summary

Supertonic is a 99M-parameter open-weight TTS system running locally via ONNX Runtime across 31 languages, with real-time synthesis at 44.1kHz and expression tags for natural nuance. Its multi-runtime SDKs (Python, Node.js, Rust, etc.) and edge-device readiness enable zero-network, private inference. The latest v1.3.1 adds a local HTTP server with OpenAI-compatible `/v1/audio/speech` endpoints and Voice Builder for custom voice profiles.

Key Takeaways
  • Evaluate Supertonic for embedding multilingual, real-time TTS into your agent orchestration or edge applications using its ONNX-based SDKs.
Why it matters

For building AI agents or voice-enabled tools, this provides a lightweight, privacy-preserving TTS that can run on-device without cloud costs, ideal for edge deployments or latency-sensitive pipelines.

Author

supertone-inc