LibreAI / Audio / MOSS-TTS-Nano
// audio · OpenMOSS/MOSS-TTS-Nano

MOSS-TTS-Nano

MOSS-TTS-Nano: a 0.1B open multilingual speech model that clones voices and streams in real time on CPU

★ 4.5k stars⑂ 557 forksApache-2.0updated 2026-09
▦ visual — this project's README ships no embeddable screenshot,
so here's a placeholder. The guide below is complete regardless.
// project facts

Project facts

MOSS-TTS-Nano is an open-source audio project by OpenMOSS (OpenMOSS/MOSS-TTS-Nano on GitHub). It has 4,457 GitHub stars and 557 forks, is released under the Apache-2.0 license, and was last updated on GitHub on 6 September 2026.

GitHub stars
4,457
Forks
557
License
Apache-2.0
Last updated on GitHub
6 September 2026
Category
Audio
Listing
Full install guide
Official site
Official site
// how it works

How it works

  1. Set up the environment

    Create the documented Python 3.12 Conda environment.

  2. Clone and install

    Clone the repo, install requirements, and install the package in editable mode.

  3. Clone a voice

    Run inference with a reference audio clip and the text you want spoken; weights download automatically from Hugging Face.

  4. Serve or fine-tune

    Launch the web demo or CLI server for interactive use, or fine-tune on your own data with the included code.

// features

Why people love it

Tiny 0.1B footprint

A very small autoregressive speech model designed to run in real time even on CPU.

20 languages, 48 kHz stereo

Multilingual synthesis with native stereo output at 48 kHz.

Zero-shot voice cloning

Clone a voice from a short reference recording passed as the prompt audio.

Real-time streaming

Streaming inference, including an ONNX runtime the project benchmarks at real-time on one CPU core.

CLI, web demo, and Python API

Generate or serve from the `moss-tts-nano` CLI, a local web UI on port 18083, or Python scripts.

Fine-tuning included

Training code is provided so you can adapt the model to your own voices or data.

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// run it

Run it yourself

  1. Clone the repository

    Clone the project and enter its directory.

    git clone https://github.com/OpenMOSS/MOSS-TTS-Nano.git
    cd MOSS-TTS-Nano
  2. Create the environment and install

    Create the Conda env, install requirements, and install the package.

    conda create -n moss-tts-nano python=3.12 -y
    conda activate moss-tts-nano
    pip install -r requirements.txt
    pip install -e .
  3. Clone a voice and generate

    Run inference with a reference clip (weights auto-download), or start the web demo with `python app.py`.

    python infer.py --prompt-audio-path assets/audio/zh_1.wav --text "Hello from MOSS-TTS-Nano."
// use cases

What you can build

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// faq

Questions, answered

Who maintains MOSS-TTS-Nano?

OpenMOSS, the MOSI.AI research lab, which also publishes the larger MOSS-TTS model family.

Is it free?

Yes — code and weights are Apache-2.0 licensed and downloadable from Hugging Face.

Does it need a paid API key?

No. It runs entirely locally; a GPU is optional since it is designed for CPU real-time use.

How does it compare to the full MOSS-TTS?

Nano is the 0.1B edge-friendly member of the family: far smaller and CPU-capable, trading some of the flagship 8B model's fidelity for speed and deployability.

How do I get started?

Create the Python 3.12 Conda env, clone, `pip install -r requirements.txt && pip install -e .`, then run `python infer.py` with a prompt audio file — or `python app.py` for the web demo.

// keep exploring

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// alternatives

Alternatives in Audio

The most-starred other Audio projects in the LibreAI catalogue — the realistic shortlist if MOSS-TTS-Nano is not the right fit.

Get MOSS-TTS-Nano

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