---
license: mit
tags:
    - automatic-speech-recognition
    - mms
    - pytorch
metrics:
    - wer
---

## Shared Task: Mozilla Common Voice Spontaneous Speech ASR  

https://www.codabench.org/competitions/10820/  
  
**Training code of the 1st place solution in 3 of 4 subtasks:**  
- Multilingual General  
- Best small model  
- Unseen Languages  

Please see `paper.pdf` and `training.ipynb` for the details and code entry point.  

Inference code and models are available in the following repository:  
[https://huggingface.co/vecxoz/mozilla-shared-task-1st-place-mms-inference](https://huggingface.co/vecxoz/mozilla-shared-task-1st-place-mms-inference)

Author: Igor Ivanov (team "vecxoz")  

License: MIT  
License for `KenLM` distribution can be found in the `kenlm_dist` subdirectory.  

Training datasets are not included according to the Common Voice requirements.  

1) Official bundle of Common Voice spontaneous speech datasets for 21 languages is available via the link:  
[https://datacollective.mozillafoundation.org/datasets/cmfzu8u8wa555eq8onrk334h4](https://datacollective.mozillafoundation.org/datasets/cmfzu8u8wa555eq8onrk334h4)  
2) For the 5 languages without spontaneous data we used Common Voice scripted datasets version 23. 
At the time of writing the current version is 24, and direct links to the version 23 do not work. 
Probably any current version will suit. Please search 5 corresponding languages via the link:  
[https://datacollective.mozillafoundation.org/datasets](https://datacollective.mozillafoundation.org/datasets)


Directory structure of the datasets is the following:  

```
mozilla-shared-task-1st-place-mms-training
|
|-- cv-corpus-23.0-2025-09-05
|   |
|   |-- ady
|   |   |
|   |   |-- clips
|   |   |   |-- common_voice_ady_41822822.mp3
|   |   |   |-- ...
|   |   |   |-- common_voice_ady_43592770.mp3
|   |   |-- clip_durations.tsv
|   |   |--  ...
|   |   |-- validated.tsv
|   |-- ...
|   |-- ush
|
|-- mcv-sps-st-09-2025
    |
    |-- sps-corpus-1.0-2025-09-05-aln
    |   |
    |   |-- audios
    |   |   |-- spontaneous-speech-aln-29890.mp3
    |   |   |-- ...
    |   |   |-- spontaneous-speech-aln-63486.mp3
    |   |-- ss-corpus-aln.tsv
    |   |-- ss-reported-audios-aln.tsv
    |-- ...
    |-- sps-corpus-1.0-2025-09-05-ukv
```