Model reference · open weights

pipertts_en-US_miro

Audio OpenVoiceOS Text→speech 1 build Non-commercial 730 dl/mo

pipertts_en-US_miro is an open-weight audio or speech model from OpenVoiceOS.

For self-hosting, compare this build's requirements below with the GPU you plan to rent.

  • pipertts_en-US_miro is a text-to-speech model by OpenVoiceOS that generates American English audio using the male voice Miro.
  • It utilizes the Piper VITS architecture and is exported to ONNX format for CPU inference.
  • The model is licensed under CC BY-NC-ND 4.0, which restricts use to non-commercial purposes and prohibits the creation of derivative models.

Summary of the OpenVoiceOS/pipertts_en-US_miro model card, 2026-10-01

What it is

Released byOpenVoiceOS
Released2025-08-01

From the model card

What OpenVoiceOS says about pipertts_en-US_miro

Read the model card

This is a text-to-speech voice model for American English. The voice is Miro, a male voice. It uses the Piper VITS architecture, exported to ONNX for CPU inference. It was fine-tuned from the base voice pipertts_en-GB_miro, the closest available language for this voice.

How to use

This is a Piper VITS voice, in ONNX format. Use it with any Piper-compatible runtime, or with ovos-tts-plugin-piper in OVOS:

{
  "tts": {
    "module": "ovos-tts-plugin-piper",
    "ovos-tts-plugin-piper": {
      "voice": "OpenVoiceOS/pipertts_en-US_miro"
    }
  }
}

Command line, with the piper package installed:

echo "Good morning, how are you?" | piper --model OpenVoiceOS/pipertts_en-US_miro --output_file output.wav

Training data

Trained on TigreGotico/tts-train-synthetic-miro_en-US.

Related links

  • Training-data collection: https://huggingface.co/collections/TigreGotico/synthetic-tts-datasets
  • phoonnx: https://github.com/TigreGotico/phoonnx
  • voiceclonnx: https://github.com/TigreGotico/voiceclonnx
  • TigreGotico: https://tigregotico.pt

Ownership and licensing

Miro and Dii are the recorded voices of two real people. The voices, the training data, and this model belong to TigreGotico Lda (https://tigregotico.pt).

This model is licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 (CC BY-NC-ND 4.0). You may use and share this model for non-commercial purposes only. Give attribution to TigreGotico Lda. Do not modify, adapt, or build new models from this model. Do not use the voice identity to create derivative voices.

For commercial use, for derivative models, or for any other license of the Miro or Dii voice identity, contact TigreGotico Lda.

The training checkpoint is kept out of this repository so a download is the model and not the training state. It is available on request.

Quoted from the model card on Hugging Face. The full card is behind the Hugging Face link above.

How it works

How audio & music work

Audio or textinputAudio modelrecognise / synthesiseText or audiooutputSpeech-to-text turns audio into text; text-to-speech and music models turn text into audio.
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