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OverFlow (Coqui LJ Speech)
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OverFlow (Coqui LJ Speech) is an open-weights text-to-speech model from Coqui TTS / Eren Gölge @erogol, released December 2022. Licence: apache 2.0.
Catalogue identity notes
Exact registry entry tts_models/en/ljspeech/overflow. Default vocoder vocoder_models/en/ljspeech/hifigan_v2. Model archive responded HTTP 200 to a HEAD request on 2026-09-29. CPU command documented by maintained Coqui TTS; phoneme models may require the espeak-ng system package. Memory is an estimated 4GB runtime budget, not measured usage. No original-paper MOS transferred to this separately trained checkpoint.
Model information sources
$ how it compares
Scored text-to-speech models released closest to OverFlow (Coqui LJ Speech), out of 148 with a score.
| # | model | score | where |
|---|---|---|---|
| 85 |  MMS TTS Amharic | 50±16 | local |
| 96 |  Piper (en_US lessac medium) | 47±5 | local |
| 137 | Piper (tr_TR dfki medium) | 26±4 | local |
| 139 |  Bark | 25±3 | local |
| 140 |  SpeechT5 TTS | 23±3 | local |
see all text-to-speech models · find the ones that fit your machine
$ where to run it
Other ways to run it
- Run it as published · needs ~4 GB · from github.com/idiap
uv run --python 3.11 --with 'coqui-tts[languages]' --with torch --with torchaudio --with torchcodec tts --model_name tts_models/en/ljspeech/overflow --text "Hello world." --out_path speech.wav --device cpu
Weights and documentation: github.com/idiap ↗
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