A GUI MOD based on Audiblez: Generate audiobooks from EPUB files using Kokoro's high-quality speech synthesis

This fork use Pyside6 to create a GUI for Audiblez.

The original Audiblez can be installed with pip and run with a single command.

Audiblez generates .m4b audiobooks from regular .epub e-books, using Kokoro's high-quality speech synthesis.

Kokoro v0.19 is a recently published text-to-speech model with just 82M params and very natural sounding output. It's released under Apache licence and it was trained on < 100 hours of audio. It currently supports American, British English, French, Korean, Japanese and Mandarin, and a bunch of very good voices.

On my 7945HX notebook it takes about 2 seconds convert GETTYSBURG ADDRESS by Abraham Lincoln to wav, which is about 290 words (or 1,595 characters).

How to install and run

If you have Python 3 on your computer, you can install it with pip. Be aware that it won't work with Python 3.13. Then you also need to download a couple of additional files in the same folder, which are about ~360MB:

pip install audiblez
wget https://github.com/thewh1teagle/kokoro-onnx/releases/download/model-files/kokoro-v0_19.onnx
wget https://github.com/thewh1teagle/kokoro-onnx/releases/download/model-files/voices.json

Then, the original way using audiblez with cli to convert an epub file into an audiobook, just run:

audiblez book.epub -l en-gb -v af_sky

It will first create a bunch of book_chapter_1.wav, book_chapter_2.wav, etc. files in the same directory, and at the end it will produce a book.m4b file with the whole book you can listen with VLC or any audiobook player. It will only produce the .m4b file if you have ffmpeg installed on your machine.

GUI version

The GUI version is a simple GUI that allows you to select the book, the language and the voice, and then it will convert the book into an audiobook.

git clone https://github.com/cycleuser/audiblez/
cd audiblez
pip install requirements.txt
python gui.py # This will run the GUI version with epub showing
python app.py # This will run the GUI version without epub showing

This will only generate wav files, you can convert them to m4b with ffmpeg later if you want to.

Supported Languages

Use -l option to specify the language, available language codes are: 🇺🇸 en-us, 🇬🇧 en-gb, 🇫🇷 fr-fr, 🇯🇵 ja, 🇰🇷 kr and 🇨🇳 cmn.

But in fact the languages supported by official Kokoro releases don't contain Chinese at the moment.

Speed

By default the audio is generated using a normal speed, but you can make it up to twice slower or faster by specifying a speed argument between 0.5 to 2.0:

audiblez book.epub -l en-gb -v af_sky -s 1.5

Supported Voices

Use -v option to specify the voice: available voices are af, af_bella, af_nicole, af_sarah, af_sky, am_adam, am_michael, bf_emma, bf_isabella, bm_george, bm_lewis. You can try them here: https://huggingface.co/spaces/hexgrad/Kokoro-TTS

Author

Original audiblez by Claudio Santini in 2025, distributed under MIT licence.

Related article: Convert E-books into audiobooks with Kokoro

This GUI and fork by Akino