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Speech functionality for Unity (TTS and ASR).

speech voxell

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git https://www.pkglnk.dev/speech.git

Package ID com.github.voxell.speech · Updated Apr 27, 2026

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README

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Text to Speech In Unity

Important! The current model (fastspeech) does not work well with short phrases. (e.g. "hi", "how are you", etc.)

This package provides a fully functional cross platform Text To Speech engine using deep learning models integrated in Unity with C#!

You can find the example repository here.

Text to Speech In Unity

Text To Speech

The model that we use for TTS is FastSpeech. The TFLite model that we used is converted from a pre-trained model found in the TensorflowTTS repository.

To prevent Unity from freezing when inferencing the TFLite model, we run the inference process in a new thread and play the audio in the main thread once it is ready.

Installation

Install OpenUPM-CLI
Run command in your project folder openupm add com.github.voxell.unitytts

External dependencies:

Download the TFLite models from Google Drive and import them into Unity (place them inside the Assets/StreamingAssets folder).
mapper file should be moved oustide Assets/StreamingAssets
And you are ready to go!

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Join the community!

License

This repository as a whole is licensed under the GNU Public License, Version 3. Individual files may have a different, but compatible license.

See license file for details.

References

Fastspeech
MelGAN
All TFLite model inferencing will not be possible without the help of the Unity TFLite repository.

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## Installation

Add **VX Speech Engine** to your Unity project via Package Manager:

1. Open **Window > Package Manager**
2. Click **+** > **Add package from git URL**
3. Enter:
```
https://www.pkglnk.dev/speech.git
```

[![pkglnk](https://www.pkglnk.dev/badge/speech.svg?style=pkglnk)](https://www.pkglnk.dev/pkg/speech)

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VX Speech Engine