---
license: apache-2.0
library_name: funasr
pipeline_tag: feature-extraction
---

# Step-Audio-Tokenizer

This repository contains the tokenizer model described in the paper [Step-Audio: Unified Understanding and Generation in Intelligent Speech Interaction](https://arxiv.org/abs/2502.11946).

Step-Audio LLM is the industry’s first 130-billion parameter hu-manlike unified end-to-end model that integrates multimodal speech un-derstanding and generation capabilities, including singing voice synthesis, tool utilization, role-play and multilingual/dialectal comprehension and synthesis. 

This repository provides the speech tokenizer component of Step-Audio LLM. For linguistic tokenization, we utilize the output from the Paraformer encoder, which is quantized into discrete representations at a token rate of 16.7 Hz. For semantic tokenization, we employ CosyVoice’s tokenizer, specifically designed to efficiently encode features essential for generating natural and expressive speech outputs, operating at a token rate of 25 Hz.

## More information
For more information, please refer to our repository: [Step-Audio](https://github.com/stepfun-ai/Step-Audio).