.AA File

The aa file extension is used for a proprietary audio book format used by Audible, an Internet provider of spoken audio entertainment, information, and educational programming. The company sells digital audiobooks, radio and TV programs, and audio versions of magazines and newspapers. It is owned by Amazon.

This format comes in several versions:

• Format 2 (Quality of AM radio sound - mono)
• Format 3 (Quality of FM radio sound - mono)
• Format 4 (Quality of MP3 sound - mono)

Audible audio files are often protected by DRM (Digital Rights Management).

Many current devices support AA format, with notable being Apple's iPods, Microsoft Zune, Creative Zen, Amazon Kindle and other.

MIME types:
audio/audible
audio/x-pn-audibleaudio

Files with aa file extension are in most cases audio books and other audio programs for the Audible platform by Amazon.

How to open:

You can open audible books (*.aa files) in many supported devices and programs, such as Apple iPod, Microsoft Zune or Amazon Kindle.

How to convert:

Generally speaking, *.aa files can probably be converted to MP3s with some specialized converters. However doing so is most likely against the license user agreement.