How to Prepare Audiobook Files for International Distribution via Acx

March 16, 2026

By: Audio Scene

Publishing an audiobook internationally through ACX (Audiobook Creation Exchange) can expand your reach and increase sales. Properly preparing your audiobook files is crucial to ensure a smooth distribution process and compliance with ACX requirements. This guide will walk you through the essential steps to prepare your files effectively.

Understanding ACX Requirements

Before preparing your files, familiarize yourself with ACX’s technical specifications. These include audio format, file naming conventions, and quality standards. Accurate adherence to these rules helps prevent rejection or delays in distribution.

Audio Format and Quality

  • File Format: MP3
  • Bit Rate: 192 kbps or higher
  • Sample Rate: 44,100 Hz
  • Channels: Stereo
  • File Naming: Use the pattern “chapter_01.mp3”, “chapter_02.mp3”, etc.

Ensure your audio files are free from background noise, distortion, or abrupt silences. Use audio editing software to normalize volume levels and remove any unwanted sounds.

Preparing Your Audio Files

Follow these steps to prepare your files for ACX:

  • Edit and proofread: Check for errors and ensure clarity.
  • Normalize audio: Maintain consistent volume levels throughout.
  • Split into chapters: Save each chapter as a separate MP3 file with proper naming.
  • Metadata tagging: Add appropriate tags such as title, author, and chapter info.
  • Compress and export: Export each file in MP3 format at the specified quality.

Uploading and Distributing

Once your files are ready, upload them to ACX via their portal. Double-check all metadata and cover art before submitting. ACX will review your files to ensure they meet all standards before distributing to platforms like Audible, Amazon, and iTunes.

Additional Tips for International Distribution

  • Check regional copyright laws to ensure compliance.
  • Use universal language in metadata to reach a wider audience.
  • Consider translation or localized marketing for non-English markets.

Proper preparation of your audiobook files not only ensures compliance but also enhances listener experience. Follow these guidelines to successfully distribute your audiobook internationally via ACX and reach audiences around the world.