LEMAS: A 150K-Hour Large-scale Extensible Multilingual Audio Suite with Generative Speech Models

LEMAS is a large-scale extensible multilingual audio suite, providing multilingual speech corpus (LEMAS-Dataset) with word-level timestamps, covering over 150,000 hours across 10 major languages(zh/en/de/fr/es/pt/it/ru/id/vi). Built with a rigorous alignment and confidence-based filtering pipeline, LEMAS supports diverse generative paradigms including zero-shot multilingual synthesis (LEMAS-TTS)(0.3B) and seamless speech editing (LEMAS-Edit)(0.3B).

More technical details can be found in our technical report: https://arxiv.org/abs/2601.04233

@article{zhao2026lemas,
  title={LEMAS: A 150K-Hour Large-scale Extensible Multilingual Audio Suite with Generative Speech Models},
  author={Zhao, Zhiyuan and Lin, Lijian and Zhu, Ye and Xie, Kai and Liu, Yunfei and Li, Yu},
  journal={arXiv preprint arXiv:2601.04233},
  year={2026}
}