Multilingual LibriSpeech

50,000-hour multilingual audiobook ASR corpus derived from LibriVox recordings covering 8 languages (English, German, Dutch, French, Spanish, Italian, Portuguese, Polish).

• Task: asr, multilingual
• Languages: multi
• Hours: 50000
• Domain: audiobook
• License: CC BY 4.0
• Homepage: https://www.openslr.org/94
• Paper: https://arxiv.org/abs/2012.03411

Recommendation

Best choice for large-scale multilingual ASR training with a permissive license. English component alone is 44,500 h. Non-English languages range from 500–2,400 h — enough for competitive baselines. Audiobook domain only; supplement with conversational data if needed.

Getting the data

Obtain from the dataset homepage.

Suggested processing

A recommended VoxKitchen pipeline ships in the repository at voxkitchen/templates/pipelines/asr-training-data.yaml — run it with vkit docker run.