.acx — ACX Audio File
Audible, Inc. · 2011
ACX files are proprietary audio files used exclusively for audiobook creation and distribution through the ACX platform.
Key Features
- Designed for audiobook production and distribution.
- Ensures adherence to strict technical quality standards.
- Facilitates upload to major audiobook marketplaces.
- Proprietary format tied to the ACX platform.
Best For
- Authors and narrators creating audiobooks for ACX.
- Ensuring audiobook quality meets platform standards.
- Distributing completed audiobooks through Audible, Amazon, and iTunes.
Less Ideal For
- General music listening.
- Editing or mixing audio.
- Sharing audio files with friends or collaborators outside ACX.
- Using as a standard audio playback format.
Common Use Cases
- Submitting finished audiobook chapters to ACX.
- Archiving audiobook projects before distribution.
- Providing final audio files to authors and publishers via ACX.
How to Open It
- ACX files are not meant for direct playback. You must upload them to the ACX platform through your ACX account.
- Review the ACX Audiobook Production Guidelines for specific technical requirements before creating your ACX files.
- Ensure your audio is properly exported (e.g., as MP3) and meets all specifications before packaging as ACX submissions.
What is a .acx file?
ACX files are audio files specifically designed for audiobooks. They are used as part of the ACX (Audiobook Creation Exchange) platform, which connects authors, narrators, and publishers to create and distribute audiobooks. These files typically contain the final recorded and mastered audiobook content, ready for upload to platforms like Audible, Amazon, and iTunes. Due to their specialized nature, they are not intended for general audio playback or editing by consumers.
Programs That Open .acx Files
| Platform | Program | ||
|---|---|---|---|
| Windows | ACX Audiobook Creation Exchange | Free | Official |
| macOS | ACX Audiobook Creation Exchange | Free | Official |
| Web Browser | ACX.com | Free | Official |
How to Convert .acx Files
| Format | Method |
|---|---|
| .MP3 | Export from DAW, Online Converters (use with caution) |
Common Problems with .acx Files
Frequently Asked Questions
An ACX file is an audio file formatted specifically for submission to the ACX platform for audiobook creation and distribution.
No, ACX files are not designed for direct playback. They are submission files that must meet strict technical requirements set by ACX.
You don't 'create' an ACX file directly. You produce your audiobook in a standard audio format (like MP3) that meets ACX's specifications and then upload it to the ACX platform, where it's processed as an 'ACX file' for distribution.
Technical Details
ACX files are essentially MP3 or other standard audio formats packaged in a way that adheres to ACX's specific technical requirements for audiobook narration. This includes detailed specifications for file naming, bit depth, sample rate, and peak normalization to ensure consistent quality across the platform. They are not a fundamentally new audio codec but rather a specific audio file submission format.