[HuggingFace Demo] [ModelScope Demo]
[Paper] [Demos]
IndexTTS is a GPT-style text-to-speech (TTS) model mainly based on XTTS and Tortoise. It is capable of correcting the pronunciation of Chinese characters using pinyin and controlling pauses at any position through punctuation marks. We enhanced multiple modules of the system, including the improvement of speaker condition feature representation, and the integration of BigVGAN2 to optimize audio quality. Trained on tens of thousands of hours of data, our system achieves state-of-the-art performance, outperforming current popular TTS systems such as XTTS, CosyVoice2, Fish-Speech, and F5-TTS.
Experience IndexTTS: Please contact xuanwu@bilibili.com for more detailed information.
QQ群：553460296
Discord：https://discord.gg/uT32E7KDmy
欢迎大家来交流讨论！
2025/03/25🔥🔥 We release the model parameters and inference code.2025/02/12🔥 We submitted our paper on arXiv, and released our demos and test sets.
The overview of IndexTTS is shown as follows.
The main improvements and contributions are summarized as follows:
- In Chinese scenarios, we have introduced a character-pinyin hybrid modeling approach. This allows for quick correction of mispronounced characters.
- IndexTTS incorporate a conformer conditioning encoder and a BigVGAN2-based speechcode decoder. This improves training stability, voice timbre similarity, and sound quality.
- We release all test sets here, including those for polysyllabic words, subjective and objective test sets.
| HuggingFace | ModelScope |
|---|---|
| 😁IndexTTS | IndexTTS |
Word Error Rate (WER) Results for IndexTTS and Baseline Models
| Model | aishell1_test | commonvoice_20_test_zh | commonvoice_20_test_en | librispeech_test_clean | avg |
|---|---|---|---|---|---|
| Human | 2.0 | 9.5 | 10.0 | 2.4 | 5.1 |
| CosyVoice 2 | 1.8 | 9.1 | 7.3 | 4.9 | 5.9 |
| F5TTS | 3.9 | 11.7 | 5.4 | 7.8 | 8.2 |
| Fishspeech | 2.4 | 11.4 | 8.8 | 8.0 | 8.3 |
| FireRedTTS | 2.2 | 11.0 | 16.3 | 5.7 | 7.7 |
| XTTS | 3.0 | 11.4 | 7.1 | 3.5 | 6.0 |
| IndexTTS | 1.3 | 7.0 | 5.3 | 2.1 | 3.7 |
Speaker Similarity (SS) Results for IndexTTS and Baseline Models
| Model | aishell1_test | commonvoice_20_test_zh | commonvoice_20_test_en | librispeech_test_clean | avg |
|---|---|---|---|---|---|
| Human | 0.846 | 0.809 | 0.820 | 0.858 | 0.836 |
| CosyVoice 2 | 0.796 | 0.743 | 0.742 | 0.837 | 0.788 |
| F5TTS | 0.743 | 0.747 | 0.746 | 0.828 | 0.779 |
| Fishspeech | 0.488 | 0.552 | 0.622 | 0.701 | 0.612 |
| FireRedTTS | 0.579 | 0.593 | 0.587 | 0.698 | 0.631 |
| XTTS | 0.573 | 0.586 | 0.648 | 0.761 | 0.663 |
| IndexTTS | 0.744 | 0.742 | 0.758 | 0.823 | 0.776 |
MOS Scores for Zero-Shot Cloned Voice
| Model | Prosody | Timbre | Quality | AVG |
|---|---|---|---|---|
| CosyVoice 2 | 3.67 | 4.05 | 3.73 | 3.81 |
| F5TTS | 3.56 | 3.88 | 3.56 | 3.66 |
| Fishspeech | 3.40 | 3.63 | 3.69 | 3.57 |
| FireRedTTS | 3.79 | 3.72 | 3.60 | 3.70 |
| XTTS | 3.23 | 2.99 | 3.10 | 3.11 |
| IndexTTS | 3.79 | 4.20 | 4.05 | 4.01 |
- Download this repository:
git clone https://github.com/wwzhifeng/Index-TTS-Windows.git- Install dependencies:
conda create -n index-tts python=3.10
conda activate index-tts
pip install -r requirements.txt推荐使用 huggingface-cli 工具进行模型下载（需先安装）：
pip install huggingface_hub
然后运行以下命令（Windows 下使用 ^ 表示换行）：
huggingface-cli download IndexTeam/Index-TTS ^
bigvgan_discriminator.pth bigvgan_generator.pth ^
bpe.model dvae.pth gpt.pth unigram_12000.vocab ^
--local-dir checkpoints
📌 如果下载缓慢，可尝试设置 Hugging Face 镜像（仅当前终端有效）：
set HF_ENDPOINT=https://hf-mirror.com
🔗 或者手动下载模型文件：
https://huggingface.co/IndexTeam/Index-TTS
4. Run test script:
```bash
# Please put your prompt audio in 'test_data' and rename it to 'input.wav'
PYTHONPATH=. python indextts/infer.py- Use as command line tool:
# Make sure pytorch has been installed before running this command
pip install -e .
indextts "大家好，我现在正在bilibili 体验 ai 科技，说实话，来之前我绝对想不到！AI技术已经发展到这样匪夷所思的地步了！" \
--voice reference_voice.wav \
--model_dir checkpoints \
--config checkpoints/config.yaml \
--output output.wavUse --help to see more options.
indextts --helppython webui.pyOpen your browser and visit http://127.0.0.1:7860 to see the demo.
from indextts.infer import IndexTTS
tts = IndexTTS(model_dir="checkpoints",cfg_path="checkpoints/config.yaml")
voice="reference_voice.wav"
text="大家好，我现在正在bilibili 体验 ai 科技，说实话，来之前我绝对想不到！AI技术已经发展到这样匪夷所思的地步了！比如说，现在正在说话的其实是B站为我现场复刻的数字分身，简直就是平行宇宙的另一个我了。如果大家也想体验更多深入的AIGC功能，可以访问 bilibili studio，相信我，你们也会吃惊的。"
tts.infer(voice, text, output_path)🌟 If you find our work helpful, please leave us a star and cite our paper.
@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}
}
本项目基于原开源项目 [https://github.com/index-tts/index-tts) 进行 Windows 平台整合优化。
由 王知风 维护，适配Windows系统。