AAX

AAX is a proprietary audio file format used by Audible for digital audiobooks and other audio content. The format uses the .aax file extension and is designed to be played within Audible’s ecosystem. AAX files are typically protected by digital rights management (DRM) to restrict playback to authorized devices and applications.

AAX was introduced by Audible as part of its transition from earlier formats and supports enhanced audio features. There are two common variants: AAX and AAX+. The AAX+ variant is marketed as providing higher audio quality and richer metadata, including support for chapters and bookmarks for navigation.

Playback and compatibility: AAX files are intended to be used with Audible’s own apps on iOS, Android, Kindle devices, Windows and macOS, and on certain compatible third-party devices that have been authorized by Audible. Generic media players without the appropriate DRM rights cannot play AAX files, and removing DRM or converting to other formats is typically restricted by law and terms of service in many jurisdictions.

Access and management: Users obtain AAX content through Audible via subscription or purchase, and the files are typically downloaded to a device for offline playback or streamed within the app. Content transferred or synchronized across devices is managed through the user’s Audible account.

Legality and DRM: AAX content is protected by DRM; removal or circumvention of DRM is governed by local law and the terms of service of Audible and related platforms.