How To Convert Epub Ebooks To Audiobooks Using Audiblez And Kokoro In Linux

Tired of waiting for your favorite ebook's audiobook version? Audiblez, a Python program, lets you create your own audiobooks from EPUB ebooks on Linux, macOS, and Windows.

Table of Contents

- Introduction

• Kokoro: A High-Quality TTS Model
  • Kokoro's Key Features
• Audiblez: Your EPUB-to-Audiobook Converter
  • Audiblez's Key Features
  • Supported Languages and Voices
• Installing Audiblez on Linux
• Converting EPUBs to Audiobooks
• Adjusting Audio Speed
• GPU Acceleration with Audiblez
• Conclusion

Introduction

Waiting for audiobook releases can be frustrating, especially for niche titles. Audiblez offers a solution: generate your own audiobooks using text-to-speech (TTS) technology. Powered by the Kokoro v0.19 model, Audiblez produces remarkably natural-sounding narration.

Kokoro: A High-Quality TTS Model

Kokoro is a compact yet powerful TTS model (82 million parameters) renowned for its high-quality output. It leverages StyleTTS 2 for expressive speech and ISTFTNet for efficient audio processing. Trained on ethically sourced data (public domain and synthetic audio), Kokoro delivers exceptional results.

Kokoro's Key Features:

• Top-ranked in TTS Spaces Arena benchmarks.
• Efficient training (approx. 500 GPU hours).
• Trained on a relatively small dataset (<100 hours of audio).
• Supports multiple languages (including American and British English).
• Offers diverse voice options (male and female).

Limitations: Kokoro v0.19 lacks voice cloning and relies on an external grapheme-to-phoneme (g2p) converter. Its training focuses on long-form narration, potentially affecting conversational speech performance.

Audiblez: Your EPUB-to-Audiobook Converter

Audiblez is a command-line Python program that uses Kokoro to convert EPUB ebooks into M4B audiobooks. The process involves extracting text, synthesizing speech, and combining audio chapters using ffmpeg. It supports multiple languages and voices, allowing for speed and chapter customization. Currently, Audiblez only supports .EPUB files.

Audiblez's Key Features:

• High-quality speech synthesis via Kokoro.
• Multi-language support (see below).
• Customizable voice selection (see below).
• Automatic chapter detection.
• User-friendly command-line interface.

Supported Languages and Voices:

Audiblez currently supports: en-us, en-gb, fr-fr, ja, kr, and cmn. Voice options include: af, af_bella, af_nicole, af_sarah, af_sky, am_adam, am_michael, bf_emma, bf_isabella, bm_george, and bm_lewis. Voice samples are available at the Kokoro-TTS demo: https://www.php.cn/link/3fc703661503434d7524267dfdd3e668.

Installing Audiblez on Linux

1. Install ffmpeg: Ensure ffmpeg is installed on your system.
2. Install Audiblez: Use pipx (recommended): pipx install audiblez
3. Download Kokoro: Download the Kokoro model (kokoro-v0_19.onnx) and voice files (voices.json) from https://www.php.cn/link/5798df74de9eda02fcf3d1ffb13201fd.

Converting EPUBs to Audiobooks

Use the command: audiblez book.epub -l en-us -v af_sky (replace with your file and voice).

Adjusting Audio Speed

Use the -s option (0.5x to 2.0x speed): audiblez book.epub -l en-gb -v af_sky -s 1.5

GPU Acceleration

1. Install the GPU-enabled ONNX Runtime: pip install onnxruntime-gpu
2. Run Audiblez with the --providers flag: audiblez book.epub -l en-gb -v af_sky --providers CUDAExecutionProvider

Conclusion

Audiblez simplifies audiobook creation from existing ebooks. While still under development, it provides a powerful and accessible tool. Future updates may include improved chapter navigation and image-to-text capabilities.

(Related Reads: Audiogenipy, Speech Note, eSpeak NG)

Featured Image by Stas Knop from Pexels.

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