Open Piper TTS Voices Ranked: Naturalness, Clarity and Licences
1,683 commercially usable Piper text-to-speech voices in 32 language variants, scored for naturalness and clarity, with licences, speed and direct downloads in an interactive explorer.
Loudness.ai
Research & Benchmarks
Measured audio research, with methods you can inspect.
Explore speech and audio experiments with clear methods, measured results and reproducible study data.
- Open data and code
- Methods you can reproduce
- Citable DOIs on Zenodo
Teaching Piper TTS to Read: Text Normalization and Word Timings
An open study of text preparation for Piper TTS: prices, dates, phone numbers and titles read correctly, American pronunciation for British-trained voices, and exact word timings for subtitles.
Parakeet vs Whisper Turbo and Distil on CPU
A reproducible CPU speech transcription study comparing elapsed time, word error rate, memory, chunking and INT8 versus FP32 on identical English audio.