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piper-voices

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Hello,

I am evaluating the Portuguese (Brazil) voices Cadu and Faber for use in an automated video production workflow, including potentially monetized YouTube videos.

The model cards for both voices indicate CC0, while the repository header indicates MIT. I would appreciate clarification on the licensing terms that apply to the actual model files.

Questions:

1. Does the CC0 license stated in the model cards apply specifically to the ONNX model weights, or does the MIT license shown in the repository header apply to them?
2. Does the stated CC0 license explicitly permit commercial use of these weights in monetized YouTube videos?
3. Does the CC0 license also cover the base Lessac model used for fine-tuning, or is that model subject to a separate license?
4. Are there any additional conditions or restrictions concerning redistribution or use in automated video production pipelines?

References:

• Cadu model: https://huggingface.co/rhasspy/piper-voices/tree/main/pt/pt_BR/cadu/medium
• Faber model: https://huggingface.co/rhasspy/piper-voices/tree/main/pt/pt_BR/faber/medium
• Piper source code: https://github.com/rhasspy/piper
• Voice repository: https://huggingface.co/rhasspy/piper-voices
• Training data repository: https://github.com/OHF-Voice/voice-datasets

I am not seeking legal advice. I am asking for clarification from the maintainers regarding the applicable licenses and whether these models may be used commercially in monetized video production.

Thank you for your time.