---
license: cc0-1.0
language:
- cy
task_categories:
- automatic-speech-recognition
pretty_name: Welsh ASR (Common Voice 22, filtered + rebalanced)
size_categories:
- 10K<n<100K
tags:
- cy
- cy
- common-voice
- speech
---

# Welsh ASR (Common Voice 22, filtered + rebalanced)

Welsh (`cy`) speech for ASR, built from **Mozilla Common Voice 22.0** (CC0) via
the open [`fsicoli/common_voice_22_0`](https://huggingface.co/datasets/fsicoli/common_voice_22_0) mirror. Built to fine-tune
streaming ASR models (e.g. `nvidia/nemotron-3.5-asr-streaming-0.6b`).

## Splits

| Split | Clips | Hours |
|-------|------:|------:|
| train | ? | 50.1 |
| dev   | ? | 0.8 |
| test  | ? | 2.0 |

`train` = the official validated train split + the filtered `other` bucket + the **excess
`dev`/`test` speakers**: Common Voice's official dev/test are balanced for benchmarking and far
too large to hold out when fine-tuning a low-resource language, so they are capped (dev
~0.75h, test ~2.0h) by **whole speakers** and the remainder
moved into train. Held-out `dev`/`test` stay **disjoint from train by both speaker and sentence**.



## Columns

`audio` (16 kHz mono), `text`, `lang` (`cy`), `client_id` (anonymized speaker),
`split`, `source` (`validated` | `other` | `moved-validated`), `quality_score`.