Supertonic: Lightning-Fast, On-Device Multilingual TTS

Experience the Future of Private Speech Synthesis

In an era where most AI services rely on heavy cloud infrastructure, Supertonic emerges as a game-changer for developers and privacy-conscious users. It is a lightning-fast, on-device text-to-speech (TTS) system designed to deliver high-quality audio synthesis without a single API call.

Why Supertonic Stands Out

Supertonic is built on the ONNX Runtime, allowing it to run efficiently across a vast array of platforms, including desktop, mobile, and web browsers. With a model size of approximately 99M parameters, it is significantly more compact than 0.7B to 2B class models, making it ideal for edge deployment.

Key Features: * Total Privacy: Zero network dependency means your data never leaves your device. * Multilingual Support: Now supporting 31 languages, including English, Japanese, Korean, German, and more. * High Accuracy: Superior handling of complex text, such as financial expressions, phone numbers, and technical units, where larger models often fail. * Cross-Platform: Ready-to-use examples for Python, Node.js, C++, Rust, Swift, Java, C#, and Flutter.

Performance That Matters

Supertonic 3 is not just about being small; it is about being smart. By utilizing advanced techniques like Length-Aware Rotary Position Embedding (LARoPE) and self-purifying flow matching, the system achieves competitive Word Error Rates (WER) while maintaining a minimal runtime footprint. Whether you are building a browser extension, an e-reader app, or an IoT device, Supertonic provides the speed and stability required for real-time applications.

Getting Started

Getting up and running is straightforward. For Python users, you can install the SDK via pip:

pip install supertonic

Once installed, generating speech is as simple as:

from supertonic import TTS
tts = TTS(auto_download=True)
wav, duration = tts.synthesize("Hello, this is a local, private voice.", lang="en")
tts.save_audio(wav, "output.wav")

Join the Ecosystem

Supertonic is already powering innovative projects like the TLDRL Chrome extension, PageEcho e-reader, and various voice-to-voice chatbots. With its permissive MIT license for code and OpenRAIL-M for models, it is the perfect foundation for your next AI-driven project.

Explore the Supertonic GitHub repository to dive into the documentation and start building your own on-device voice applications today.