AA stands for audible audio. Files that contain the .aa file extension normally contain audio audio books.
The AA file format allows for the storage of spoken audio words, chapter markers, bookmarks and other audio book features. AA files are commonly used on iPods, Kindles and other portable media devices.
In some cases an AA file can be converted into an MP3 file in order to make it more versatile for playback on a broader range of media devices.
The .aa file extension is also used by a variety of disc imaging programs. These AA files contain disc images that have been created by the program. This AA file format is very similar to the more popular ISO file format.
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