EchoX-8B

<div align="center"> <h1> EchoX: Towards Mitigating Acoustic-Semantic Gap via Echo Training for Speech-to-Speech LLMs </h1> </div> <p align="center"> <font size="3"> <a href="https://github.com/FreedomIntelligence/EchoX">🐈‍⬛ Github</a>&nbsp｜&nbsp <a href="https://arxiv.org/abs/2509.09174">📃 Paper</a>&nbsp｜&nbsp <a href="https://huggingface.co/spaces/FreedomIntelligence/EchoX">🚀 Space</a>&nbsp｜&nbsp <a href="https://huggingface.co/datasets/FreedomIntelligence/EchoX-Dialougues">📊 EchoX-Dialougues</a>&nbsp｜&nbsp <a href="https://huggingface.co/datasets/KurtDu/EchoX-Dialogues-Plus">📊 EchoX-Dialogues-Plus</a> </font> </p>

Model Description

EchoX is a Speech-to-Speech large language model that addresses the acoustic-semantic gap. By introducing Echo Training, EchoX integrates semantic and acoustic learning, mitigating the degradation of reasoning ability observed in existing speech-based LLMs. It is trained on only 10k hours of data while delivering state-of-the-art results in knowledge-based question answering and speech interaction tasks.

Key Features

<div> <ul> <font size="3"><li>Mitigates Acoustic-Semantic Gap in Speech-to-Speech LLMs</li></font> <font size="3"><li>Introduces Echo Training with a Novel Three-Stage Pipeline (S2T, T2C, Echo)</li></font> <font size="3"><li>Trained on Only 10k Hours of Curated Data, Ensuring Efficiency</li></font> <font size="3"><li>Achieves State-of-the-Art Performance in Knowledge-Based QA Benchmarks</li></font> <font size="3"><li>Preserves Reasoning and Knowledge Abilities for Interactive Speech Tasks</li></font> </ul> </div>

Usage

Load the EchoX model and run inference with your audio files as shown in the <a href="https://github.com/FreedomIntelligence/EchoX">GitHub repository</a>.

<span>📖 Citation</span>

@misc{zhang2025echoxmitigatingacousticsemanticgap,
      title={EchoX: Towards Mitigating Acoustic-Semantic Gap via Echo Training for Speech-to-Speech LLMs}, 
      author={Yuhao Zhang and Yuhao Du and Zhanchen Dai and Xiangnan Ma and Kaiqi Kou and Benyou Wang and Haizhou Li},
      year={2025},
      eprint={2509.09174},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2509.09174}, 
}