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AI audio

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Confucius4-TTS

AI audio

Confucius4-TTS is an open-source multilingual and cross-lingual zero-shot text-to-speech (TTS) system from NetEase Youdao, based on a "speech encoder + large language model (LLM)" architecture. While synthesizing high-quality speech, it maintains the consistency of the speaker's timbre across languages. It supports 14 languages in total—Chinese, English, Japanese, Korean, German, French, Spanish, Indonesian, Italian, Thai, Portuguese, Russian, Malay, and Vietnamese—and can switch seamlessly between languages. The project offers capabilities such as unconstrained voice cloning (no reference text transcription required), cross-lingual timbre transfer (synthesizing accent-free speech), zero-shot timbre transfer (cloning a timbre without additional training), and emotion transfer (cloning tone and emotion), and demonstrates strong generalization in real multilingual scenarios. Usage methods include example scripts, a Python API, a vLLM accelerated backend, a Gradio web interface, and a FastAPI server, supporting both non-streaming and streaming generation. The code and models are hosted on GitHub, and an online demo is also provided.

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