Zonos Beta Release: Open-Source Voice Cloning by Zyphra
3 min read
Zyphra launches **Zonos-v0.1**, an open-source voice cloning model with **high-fidelity speech, real-time performance, and multilingual support**. It can clone voices with **5-30s of audio** and runs efficiently on **RTX 4090 GPUs**. A major step for AI voice synthesis.
February 12, 2025 13:24
Zyphra has introduced Zonos-v0.1, an open-source voice cloning model under the Apache 2.0 license, offering high-fidelity speech synthesis with multilingual support. Here’s what you need to know:
Key Highlights
1️⃣ Models & Architecture
- Two models: A 1.6B-parameter transformer model and a hybrid model of similar size.
- Available under Apache 2.0, making them free for developers and researchers.
2️⃣ Training & Multilingual Capabilities
- Trained on 200,000 hours of speech data across multiple languages.
- Predominantly English, but also supports Chinese, Japanese, French, Spanish, and German.
3️⃣ Core Features
- Voice Cloning: Requires just 5 to 30 seconds of sample audio for cloning.
- Expressiveness: Controls for speaking rate, pitch, audio quality, and emotions like happiness, anger, fear, sadness, and surprise.
- Native 44 kHz Audio Quality for realistic speech generation.
4️⃣ Performance & Efficiency
- Optimized for real-time applications with a latency of 200-300ms.
- Runs efficiently on NVIDIA RTX 4090 GPUs, with a real-time factor above 1.
5️⃣ Accessibility & Deployment
- Available on Hugging Face, with model weights for both architectures.
- Supports a Gradio-based UI, Docker setup, and an API for cloud-based use.
6️⃣ Feedback & Limitations
- Praised for high-quality output and expressiveness, but some users report occasional audio artifacts and alignment issues.
- Zyphra plans future updates to enhance language support, pronunciation accuracy, emotional control, and inference efficiency.
7️⃣ Community & Reception
- Posts on X (formerly Twitter) show strong enthusiasm, particularly around its open-source nature and potential for developers.
Why It Matters
Zonos-v0.1 represents a major step forward in open-source voice cloning, offering tools that rival proprietary models. With its high-quality speech synthesis, low-latency performance, and multilingual capabilities, it opens new possibilities for TTS applications, AI-powered assistants, and creative content development.
For developers and researchers in text-to-speech and AI voice cloning, this is an exciting opportunity to contribute, test, and build upon a truly open AI model.