## 👉🏻 IndexTTS2 👈🏻

<center><h3>IndexTTS2: A Breakthrough in Emotionally Expressive and Duration-Controlled Auto-Regressive Zero-Shot Text-to-Speech</h3></center>

<div align="center">
  <a href='https://arxiv.org/abs/2506.21619'>
    <img src='https://img.shields.io/badge/ArXiv-2506.21619-red?logo=arxiv'/>
  </a>
  <br/>
  <a href='https://github.com/index-tts/index-tts'>
    <img src='https://img.shields.io/badge/GitHub-Code-orange?logo=github'/>
  </a>
  <a href='https://index-tts.github.io/index-tts2.github.io/'>
    <img src='https://img.shields.io/badge/GitHub-Demo-orange?logo=github'/>
  </a>
  <br/>
  <a href='https://huggingface.co/spaces/IndexTeam/IndexTTS'>
    <img src='https://img.shields.io/badge/HuggingFace-Demo-blue?logo=huggingface'/>
  </a>
  <a href='https://huggingface.co/IndexTeam/IndexTTS-2.0'>
    <img src='https://img.shields.io/badge/HuggingFace-Model-blue?logo=huggingface' />
  </a>
  <br/>
  <a href='https://modelscope.cn/studios/IndexTeam/IndexTTS-Demo'>
    <img src='https://img.shields.io/badge/ModelScope-Demo-purple?logo=modelscope'/>
  </a>
  <a href='https://modelscope.cn/models/IndexTeam/IndexTTS-2.0'>
    <img src='https://img.shields.io/badge/ModelScope-Model-purple?logo=modelscope'/>
  </a>
</div>

### Contact
QQ Group：553460296(No.1) 1048202584(No.2) 764630270(No.3)\
Discord：https://discord.gg/uT32E7KDmy  \
Emal：indexspeech@bilibili.com  \
欢迎大家来交流讨论！
## 📣 Updates

- `2025/09/08` 🔥🔥🔥  We release the **IndexTTS-2**
    - The first autoregressive TTS model with precise synthesis duration control: supporting both controllable and uncontrollable modes 
    - The model achieves highly expressive emotional speech synthesis, with emotion-controllable capabilities enabled through multiple input modalities.
- `2025/05/14` 🔥🔥 We release the **IndexTTS-1.5**, Significantly improve the model's stability and its performance in the English language.
- `2025/03/25` 🔥 We release **IndexTTS-1.0** model parameters and inference code.
- `2025/02/12` 🔥 We submitted our paper on arXiv, and released our demos and test sets.

## Acknowledge
1. [tortoise-tts](https://github.com/neonbjb/tortoise-tts)
2. [XTTSv2](https://github.com/coqui-ai/TTS)
3. [BigVGAN](https://github.com/NVIDIA/BigVGAN)
4. [wenet](https://github.com/wenet-e2e/wenet/tree/main)
5. [icefall](https://github.com/k2-fsa/icefall)
6. [maskgct](https://github.com/open-mmlab/Amphion/tree/main/models/tts/maskgct)
7. [seed-vc](https://github.com/Plachtaa/seed-vc)


## 📚 Citation

🌟 If you find our work helpful, please leave us a star and cite our paper.


IndexTTS2
```
@article{zhou2025indextts2,
  title={IndexTTS2: A Breakthrough in Emotionally Expressive and Duration-Controlled Auto-Regressive Zero-Shot Text-to-Speech},
  author={Siyi Zhou, Yiquan Zhou, Yi He, Xun Zhou, Jinchao Wang, Wei Deng, Jingchen Shu},
  journal={arXiv preprint arXiv:2506.21619},
  year={2025}
}
```

IndexTTS
```
@article{deng2025indextts,
  title={IndexTTS: An Industrial-Level Controllable and Efficient Zero-Shot Text-To-Speech System},
  author={Wei Deng, Siyi Zhou, Jingchen Shu, Jinchao Wang, Lu Wang},
  journal={arXiv preprint arXiv:2502.05512},
  year={2025},
  doi={10.48550/arXiv.2502.05512},
  url={https://arxiv.org/abs/2502.05512}
}
```