VOICE MODELS - QUICK REFERENCE GUIDE
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TOTAL VOICES IN MOD: 28 models across 8 languages

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GERMAN VOICES (10 models)
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THORSTEN VOICE FAMILY (6 models) - CC0 / CC BY 4.0
Creator: Thorsten Müller (https://www.thorsten-voice.de/)
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1. de_DE-thorsten-medium      Friendly, medium quality (DEFAULT GERMAN)
2. de_DE-thorsten-high        Friendly, high quality (larger file)
3. de_DE-bernd-low            Neutral, low resource
4. de_DE-bernd-medium         Neutral, medium quality
5. de_DE-pavoque-low          Low resource
6. de_DE-pavoque-medium       Medium quality

LIBRITTS GERMAN VOICES (4 models) - CC BY 4.0
Source: LibriTTS Dataset (https://github.com/google-research-datasets/libritts)
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7. de_DE-eva_k-x-low          Female voice, low resource
8. de_DE-eva_k-medium         Female voice, medium quality
9. de_DE-karlsson-x-low       Low resource
10. de_DE-karlsson-medium     Medium quality

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ENGLISH VOICES (7 models) - CC BY 4.0
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ENGLISH (BRITISH) - LIBRITTS (3 models)
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1. en_GB-alan-low             Friendly, low resource
2. en_GB-alan-medium          Friendly, medium quality
3. en_GB-sam-medium           Neutral, medium quality

ENGLISH (AMERICAN) - LIBRITTS (4 models)
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4. en_US-libritts-high        Natural, high quality
5. en_US-ryan-low             Low resource
6. en_US-ryan-medium          Medium quality
7. en_US-ryan-high            High quality

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FRENCH VOICES (4 models) - CC BY 4.0
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Source: LibriTTS Dataset (https://github.com/google-research-datasets/libritts)
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1. fr_FR-siwis-low            Low resource
2. fr_FR-siwis-medium         Medium quality
3. fr_FR-gilles-low           Low resource
4. fr_FR-gilles-medium        Medium quality

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SPANISH VOICES (2 models) - CC BY 4.0
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Source: LibriTTS Dataset (https://github.com/google-research-datasets/libritts)
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1. es_ES-carlosmira-low       Low resource
2. es_ES-carlosmira-medium    Medium quality

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ITALIAN VOICES (2 models) - CC BY 4.0
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Source: LibriTTS Dataset (https://github.com/google-research-datasets/libritts)
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1. it_IT-riccardo-x-low       Low resource
2. it_IT-riccardo-medium      Medium quality

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RUSSIAN VOICES (2 models) - CC BY 4.0
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Source: LibriTTS Dataset (https://github.com/google-research-datasets/libritts)
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1. ru_RU-aidar-low            Low resource
2. ru_RU-aidar-medium         Medium quality

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DUTCH VOICES (1 model) - CC BY 4.0
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Source: LibriTTS Dataset (https://github.com/google-research-datasets/libritts)
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1. nl_NL-mls_5809-low         Low resource

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LICENSE SUMMARY
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THORSTEN VOICE (6 models)
├─ License: CC0 / CC BY 4.0
├─ Creator: Thorsten Müller
├─ Website: https://www.thorsten-voice.de/
├─ Commercial Use: ✅ YES
├─ Attribution: Required (Thorsten Müller)
└─ Languages: German only

LIBRITTS DATASET (22 models)
├─ License: CC BY 4.0
├─ Source: https://github.com/google-research-datasets/libritts
├─ Citation: Zen, Heiga, et al. (2019) arXiv:1904.02882
├─ Commercial Use: ✅ YES (with attribution)
├─ Attribution: Required (dataset + creators)
└─ Languages: German, English (GB/US), French, Spanish, Italian, Russian, Dutch

PIPER TTS ENGINE
├─ License: MIT
├─ Source: https://github.com/rhasspy/piper
├─ Creator: Rhasspy Project
├─ Commercial Use: ✅ YES
└─ Attribution: Required (copyright notice)

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USAGE CONFIGURATION
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File: <game_dir>/config/tts_voices.json

Current Settings:
- default_citizen_voice: "de_DE-thorsten-medium"
- tts_voice: "de_DE-thorsten-medium"
- auto_language_selection: true (will auto-select based on Minecraft language)

To change default voice:
1. Edit tts_voices.json
2. Update "default_citizen_voice" to desired model ID
3. Restart the mod

Example:
  "default_citizen_voice": "en_US-ryan-high"
  "tts_voice": "en_US-ryan-high"

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LANGUAGE AUTO-SELECTION MAPPING
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When auto_language_selection is ENABLED:

English (en_US) → en_US-ryan-medium
English (en_GB) → en_GB-alan-medium
German (de_DE) → de_DE-thorsten-medium ✅ (default)
French (fr_FR) → fr_FR-siwis-medium
Spanish (es_ES) → es_ES-carlosmira-medium
Italian (it_IT) → it_IT-riccardo-medium
Russian (ru_RU) → ru_RU-aidar-medium
Dutch (nl_NL) → nl_NL-mls_5809-low

(Other languages will fall back to de_DE-thorsten-medium)

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COMMERCIAL USE GUIDELINES
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✅ ALL 28 VOICES MAY BE USED COMMERCIALLY

Required Steps:
1. Include proper attribution (see templates below)
2. Maintain attribution through all distributions
3. Document the source of voice models
4. Include LICENSES/ folder with your mod
5. Make attribution easily accessible to users

Attribution Templates:

For Thorsten Voice:
"German voice models by Thorsten Müller 
(https://www.thorsten-voice.de/), 
licensed under CC0 / CC BY 4.0."

For LibriTTS Voices:
"Voice models derived from LibriTTS dataset 
(https://github.com/google-research-datasets/libritts), 
licensed under CC BY 4.0.
Citation: Zen, Heiga, et al. 'LibriTTS: A Corpus Derived 
from LibriSpeech for Text-to-Speech.' 
arXiv preprint arXiv:1904.02882 (2019)."

For Complete Attribution (use both):
Include both templates in your README or documentation.

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PERFORMANCE RECOMMENDATIONS
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For Different Scenarios:

📱 MOBILE/LOW POWER:
→ Use "*-low" variants:
  - de_DE-thorsten-low (not available, use bernd-low)
  - de_DE-bernd-low
  - de_DE-eva_k-x-low
  - en_GB-alan-low
  - en_US-ryan-low
  - etc.

💻 STANDARD/BALANCED:
→ Use "*-medium" variants:
  - de_DE-thorsten-medium ✅ (default, recommended)
  - de_DE-bernd-medium
  - en_GB-alan-medium
  - en_US-ryan-medium
  - etc.

🎮 HIGH QUALITY:
→ Use "-high" variants:
  - de_DE-thorsten-high
  - en_US-libritts-high
  - en_US-ryan-high
  - (limited to high-quality variants)

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TROUBLESHOOTING
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Q: A voice model isn't working
A: Check Piper cache at: <game_dir>/piper_cache/piper_models/
   Models auto-download on first use.

Q: Which voice is currently selected?
A: Check config file: intelligentvillagers-voicechat.toml
   Look for: tts_voice = "..."

Q: Can I add new voice models?
A: Yes! Any Piper model from Hugging Face can be used:
   1. Add entry to tts_voices.json with correct ID
   2. Update VOICE_MODELS_LICENSE.txt with license info
   3. Include proper attribution in LICENSES/

Q: Do all voices support all languages?
A: No. Each voice is trained for a specific language.
   Use language-specific voices for best results.

Q: Commercial use - what's needed?
A: Include LICENSES/ folder with distribution.
   Use attribution templates from this guide.

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REFERENCES
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Documentation:
- VOICE_MODELS_LICENSE.txt        (comprehensive details)
- PIPER_LICENSE.txt               (Piper engine info)
- INDEX.md                        (navigation guide)

Projects:
- Piper TTS: https://github.com/rhasspy/piper
- LibriTTS: https://github.com/google-research-datasets/libritts
- Thorsten Voice: https://www.thorsten-voice.de/

Licenses:
- CC BY 4.0: https://creativecommons.org/licenses/by/4.0/
- CC0: https://creativecommons.org/publicdomain/zero/1.0/
- MIT: https://opensource.org/licenses/MIT

Configuration:
- tts_voices.json          (available models & current selection)
- intelligentvillagers-voicechat.toml (TTS system settings)

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VERSION HISTORY
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v2.0 - 2025 - COMPREHENSIVE AUDIT & CORRECTION
- Corrected all 28 voice model licenses in tts_voices.json
- Expanded documentation with all voice details
- Added language-specific breakdown
- Added commercial use guidelines
- Added performance recommendations
- Added audit trail and verification

v1.0 - Initial documentation
- Basic voice model documentation
- Limited model listing
- Generic license information

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END OF VOICE MODELS QUICK REFERENCE
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