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created as part of [OVOS TTS plugin benchmarks](https://github.com/TigreGotico/tts-benchmarks)
## Metrics
- **RTF - Real Time Factor** - real time factor, how many seconds it takes to create 1 second of audio - (*lower is
better*)
- **WER - Word Error Rate** - this is a proxy for understandability, assuming more understandable speech scores better
in STT, correlates to how many words the TTS pronounces wrong - (*lower is better*)
- **DAMERAU LEVENSHTEIN SIMILARITY** - this is also a proxy for understandability, assuming more understandable speech
scores better - (*higher is better*)
- **Pitch Variability** - Measures the variation in the pitch of the speech. Higher variability can indicate more
natural, human-like speech, while low variability may suggest robotic or monotone output. (*Higher is better*)
> **NOTE**: for STT google is used, and in case of failure Whisper large V3 as fallback
#### English
| **Lang** | **Plugin** | **Voice** | **RTF (Real Time Factor)** | **WER** | **DAMERAU LEVENSHTEIN SIMILARITY** | **Pitch Variability** |
|----------|---------------------------|---------------------|----------------------------|---------|------------------------------------|-----------------------|
| en-gb | ovos-tts-plugin-edge-tts | en-GB-RyanNeural | 0.2093 | 0.3981 | 0.8656 | 29.8690 |
| en-gb | ovos-tts-plugin-google-tx | Default | 0.0893 | 0.4169 | 0.8598 | 35.6121 |
| en-gb | ovos-tts-plugin-mimic | ap | 0.0225 | 0.6721 | 0.6721 | 14.1314 |
| en-gb | ovos-tts-plugin-espeak | Default | 0.0020 | 0.5761 | 0.6326 | 8.7964 |
| en-gb | ovos-tts-plugin-SAM | Default | 0.0010 | 0.9953 | 0.2112 | 11.2043 |
| en-us | ovos-tts-plugin-edge-tts | en-US-AriaNeural | 0.1512 | 0.3934 | 0.8713 | 39.8255 |
| en-us | ovos-tts-plugin-google-tx | Default | 0.0918 | 0.4988 | 0.6953 | 39.8607 |
| en-us | ovos-tts-plugin-pico | Default | 0.0112 | 0.2365 | 0.8933 | 28.1715 |
| en-us | ovos-tts-plugin-espeak | Default | 0.0020 | 0.6347 | 0.5764 | 9.0432 |
| en-au | ovos-tts-plugin-edge-tts | en-AU-NatashaNeural | 0.1316 | 0.4473 | 0.7974 | 49.3665 |
| en-au | ovos-tts-plugin-google-tx | Default | 0.0884 | 0.4333 | 0.8375 | 38.4066 |
| en-ng | ovos-tts-plugin-edge-tts | en-NG-AbeoNeural | 0.1959 | 0.4941 | 0.7830 | 22.9295 |
#### Catalan
| **Lang** | **Plugin** | **Voice** | **RTF (Real Time Factor)** | **WER** | **DAMERAU LEVENSHTEIN SIMILARITY** | **Pitch Variability** |
|----------|----------------------------------------|---------------------------|----------------------------|---------|------------------------------------|-----------------------|
| ca | ovos-tts-plugin-coqui | tts_models/ca/custom/vits | 0.3832 | 0.7797 | 0.5681 | 30.2213 |
| ca | ovos-tts-plugin-edge-tts | ca-ES-JoanaNeural | 0.1812 | 0.2863 | 0.9378 | 42.6373 |
| ca | ovos-tts-plugin-edge-tts | ca-ES-EnricNeural | 0.1485 | 0.2775 | 0.9406 | 26.2174 |
| ca | ovos-tts-plugin-google-tx | Default | 0.1045 | 0.3062 | 0.9311 | 34.3610 |
| ca | ovos-tts-plugin-espeak | Default | 0.0025 | 0.5947 | 0.6753 | 9.0775 |
| ca | ovos-tts-plugin-matxa-multispeaker-cat | central/grau | 0.0984 | 0.3414 | 0.9112 | 23.2631 |
| ca | ovos-tts-plugin-matxa-multispeaker-cat | central/elia | 0.1005 | 0.3590 | 0.9048 | 26.2063 |
| ca | ovos-tts-plugin-matxa-multispeaker-cat | balear/quim | 0.0843 | 0.4956 | 0.8401 | 20.1048 |
| ca | ovos-tts-plugin-matxa-multispeaker-cat | balear/olga | 0.1146 | 0.4956 | 0.8305 | 23.7260 |
| ca | ovos-tts-plugin-matxa-multispeaker-cat | valencia/lluc | 0.0832 | 0.3568 | 0.9175 | 19.0406 |
| ca | ovos-tts-plugin-matxa-multispeaker-cat | valencia/gina | 0.1000 | 0.3744 | 0.9059 | 38.8802 |
| ca | ovos-tts-plugin-matxa-multispeaker-cat | nord-occidental/pere | 0.1036 | 0.3436 | 0.9082 | 18.7704 |
| ca | ovos-tts-plugin-matxa-multispeaker-cat | nord-occidental/emma | 0.0824 | 0.3612 | 0.9079 | 30.6723 |
#### Spanish
| **Lang** | **Plugin** | **Voice** | **RTF (Real Time Factor)** | **WER** | **DAMERAU LEVENSHTEIN SIMILARITY** | **Pitch Variability** |
|----------|---------------------------|--------------------|----------------------------|---------|------------------------------------|-----------------------|
| es-es | ovos-tts-plugin-edge-tts | es-ES-AlvaroNeural | 0.1379 | 0.2246 | 0.9535 | 29.0270 |
| es-es | ovos-tts-plugin-edge-tts | es-ES-ElviraNeural | 0.1485 | 0.2246 | 0.9521 | 25.4132 |
| es-es | ovos-tts-plugin-pico | Default | 0.0109 | 0.2268 | 0.9546 | 37.7614 |
| es-es | ovos-tts-plugin-google-tx | Default | 0.1012 | 0.2268 | 0.9541 | 30.5966 |
| es-es | ovos-tts-plugin-cotovia | sabela | 0.0604 | 0.2419 | 0.9465 | 26.3303 |
| es-es | ovos-tts-plugin-cotovia | iago | 0.0247 | 0.3218 | 0.8972 | 6.9345 |
| es-es | ovos-tts-plugin-espeak | Default | 0.0019 | 0.3888 | 0.8137 | 8.7267 |
#### Galician
| **Lang** | **Plugin** | **Voice** | **RTF (Real Time Factor)** | **WER** | **DAMERAU LEVENSHTEIN SIMILARITY** | **Pitch Variability** |
|----------|--------------------------|--------------------|----------------------------|---------|------------------------------------|-----------------------|
| gl | ovos-tts-plugin-edge-tts | gl-ES-SabelaNeural | 0.6924 | 0.3855 | 0.9181 | 34.8462 |
| gl | ovos-tts-plugin-edge-tts | gl-ES-RoiNeural | 0.2306 | 0.4136 | 0.8939 | 21.0103 |
| gl | ovos-tts-plugin-nos | celtia | 0.5774 | 0.4369 | 0.9008 | 61.3171 |
| gl | ovos-tts-plugin-nos | sabela | 0.3576 | 0.5327 | 0.8560 | 19.8559 |
| gl | ovos-tts-plugin-cotovia | sabela | 0.1199 | 0.4533 | 0.8926 | 29.6241 |
| gl | ovos-tts-plugin-cotovia | iago | 0.0465 | 0.5491 | 0.7919 | 6.6335 |
#### Portuguese
| **Lang** | **Plugin** | **Voice** | **RTF (Real Time Factor)** | **WER** | **DAMERAU LEVENSHTEIN SIMILARITY** | **Pitch Variability** |
|----------|---------------------------|-----------------------|----------------------------|---------|------------------------------------|-----------------------|
| pt-pt | ovos-tts-plugin-coqui | tts_models/pt/cv/vits | 0.1850 | 0.4432 | 0.8491 | 8.7526 |
| pt-pt | ovos-tts-plugin-edge-tts | pt-PT-DuarteNeural | 0.2512 | 0.3515 | 0.9019 | 20.2053 |
| pt-pt | ovos-tts-plugin-edge-tts | pt-PT-RaquelNeural | 0.2342 | 0.3362 | 0.9194 | 30.0802 |
| pt-pt | ovos-tts-plugin-google-tx | Default | 0.1084 | 0.3100 | 0.9271 | 29.7265 |
| pt-pt | ovos-tts-plugin-espeak | Default | 0.0020 | 0.5764 | 0.6959 | 6.8524 |
| pt-br | ovos-tts-plugin-edge-tts | pt-BR-AntonioNeural | 0.5301 | 0.3297 | 0.9179 | 31.7333 |
| pt-br | ovos-tts-plugin-edge-tts | pt-BR-FranciscaNeural | 0.3377 | 0.3166 | 0.9269 | 38.6105 |
| pt-br | ovos-tts-plugin-google-tx | Default | 0.0850 | 0.2904 | 0.9348 | 28.2025 |
| pt-br | ovos-tts-plugin-espeak | Default | 0.0019 | 0.4301 | 0.7515 | 8.0846 |
#### French
| **Lang** | **Plugin** | **Voice** | **RTF (Real Time Factor)** | **WER** | **DAMERAU LEVENSHTEIN SIMILARITY** | **Pitch Variability** |
|----------|---------------------------|--------------------------|----------------------------|---------|------------------------------------|-----------------------|
| fr-fr | ovos-tts-plugin-coqui | tts_models/fr/css10/vits | 0.1579 | 0.3553 | 0.8711 | 15.4426 |
| fr-fr | ovos-tts-plugin-pico | Default | 0.0137 | 0.2894 | 0.9090 | 23.9790 |
| fr-fr | ovos-tts-plugin-google-tx | Default | 0.1147 | 0.2702 | 0.9271 | 20.5713 |
| fr-fr | ovos-tts-plugin-espeak | Default | 0.0023 | 0.4000 | 0.7775 | 8.0871 |
#### Italian
| **Lang** | **Plugin** | **Voice** | **RTF (Real Time Factor)** | **WER** | **DAMERAU LEVENSHTEIN SIMILARITY** | **Pitch Variability** |
|----------|---------------------------|-----------------------------------|----------------------------|---------|------------------------------------|-----------------------|
| it-it | ovos-tts-plugin-coqui | tts_models/it/mai_male/vits | 0.2595 | 0.5500 | 0.7977 | 35.2621 |
| it-it | ovos-tts-plugin-coqui | tts_models/it/mai_female/vits | 0.4870 | 0.5071 | 0.8034 | 35.8200 |
| it-it | ovos-tts-plugin-coqui | tts_models/it/mai_male/glow-tts | 0.3416 | 0.5310 | 0.7990 | 34.0779 |
| it-it | ovos-tts-plugin-coqui | tts_models/it/mai_female/glow-tts | 0.3333 | 0.5667 | 0.7659 | 33.3923 |
| it-it | ovos-tts-plugin-pico | Default | 0.0110 | 0.2595 | 0.9471 | 31.1569 |
| it-it | ovos-tts-plugin-google-tx | Default | 0.1202 | 0.2476 | 0.9551 | 18.5613 |
| it-it | ovos-tts-plugin-espeak | Default | 0.0022 | 0.2595 | 0.8885 | 8.4683 |
#### German
| **Lang** | **Plugin** | **Voice** | **RTF (Real Time Factor)** | **WER** | **DAMERAU LEVENSHTEIN SIMILARITY** | **Pitch Variability** |
|----------|---------------------------|-----------------------------------|----------------------------|---------|------------------------------------|-----------------------|
| de-de | ovos-tts-plugin-coqui | tts_models/de/thorsten/vits | 0.6571 | 0.2824 | 0.9319 | 25.7637 |
| de-de | ovos-tts-plugin-coqui | tts_models/de/thorsten/vits--neon | 0.4015 | 0.2941 | 0.9357 | 25.5361 |
| de-de | ovos-tts-plugin-pico | Default | 0.0123 | 0.2871 | 0.9276 | 31.3136 |
| de-de | ovos-tts-plugin-google-tx | Default | 0.1090 | 0.2635 | 0.9476 | 33.7452 |
| de-de | ovos-tts-plugin-espeak | Default | 0.0020 | 0.2541 | 0.8319 | 8.9455 |
#### Dutch
| **Lang** | **Plugin** | **Voice** | **RTF (Real Time Factor)** | **WER** | **DAMERAU LEVENSHTEIN SIMILARITY** | **Pitch Variability** |
|----------|---------------------------|--------------------------|----------------------------|---------|------------------------------------|-----------------------|
| nl-nl | ovos-tts-plugin-coqui | tts_models/nl/css10/vits | 0.1673 | 0.3620 | 0.8814 | 28.7019 |
| nl-nl | ovos-tts-plugin-google-tx | Default | 0.1159 | 0.2870 | 0.9337 | 28.6398 |
| nl-nl | ovos-tts-plugin-espeak | Default | 0.0058 | 0.4945 | 0.6570 | 8.5742 |
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