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0N-Labs/
onyx-tts

Name: onyx-tts
Availability: InStock

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Onyx-TTS

Onyx-TTS is a high-performance, multilingual text-to-speech system developed by 0N Labs. It's built on ONNX Runtime, delivering fast and efficient speech synthesis with minimal resource requirements.

Model Details

Developed by: 0N Labs
Model type: Text-to-Speech
Languages: Multiple languages supported
License: Apache 2.0
Model size: ~300MB (quantized: ~80MB)

Getting Started

Prerequisites

Python 3.8 or higher
pip (Python package manager)

Installation

Clone the repository:

bash
1git clone https://github.com/0N-Labs/onyx-tts.git 2cd onyx-tts
Create and activate a virtual environment (recommended):

bash
1python -m venv venv 2source venv/bin/activate # On Windows: venv\Scripts\activate
Install the required dependencies:

pip install -r requirements.txt

Downloading the Model

Download the model files from the Releases page and place them in your project directory:

onyx-v1.0.onnx (main model)
voices-v1.0.bin (voice data)

Basic Usage

python

import soundfile as sf
from onyx_tts import OnyxTTS

# Initialize the TTS engine with the downloaded model files
onyx = OnyxTTS("onyx-v1.0.onnx", "voices-v1.0.bin")

# Generate speech
samples, sample_rate = onyx.create(
    "Hello! This is Onyx TTS by 0N Labs.",
    voice="af_sarah",           # See available voices in VOICES.md
    speed=1.0,                  # Adjust speed (0.5–2.0)
    lang="en-us"
)

# Save the generated audio
sf.write("output.wav", samples, sample_rate)
print("Speech generated successfully!")

Running the Web Interface

To launch the demo UI:

python web_interface.py

Then visit: 👉 http://localhost:7860

Available Voices

To list all available voices:

python

from onyx_tts import OnyxTTS

onyx = OnyxTTS("onyx-v1.0.onnx", "voices-v1.0.bin")
print("Available voices:", onyx.get_voices())

See the full list in VOICES.md.

Troubleshooting

If you run into issues:

Ensure all model files are in the correct location
Check that all dependencies are installed
Verify Python version is 3.8 or higher
Visit the issues page for known bugs and fixes

License

Onyx-TTS: MIT
Onyx model: Apache 2.0

Citation

bibtex

@software{onyx-tts,
  author = {0N Labs},
  title = {Onyx-TTS: High-performance Text-to-Speech},
  year = {2025},
  publisher = {GitHub},
  journal = {GitHub repository},
  howpublished = {\url{https://github.com/0N-Labs/onyx-tts}}
}