I wanted to be able to play audio books from Audible.com in my car.  I don't have an iPod in this car, but my car stereo does have an audio input jack.  I have a cheap MP3 player.  So I thought I'd load an audio book to the MP3 player, to listen to in the car.

I tried using the DirectShow filter for .aa files, with multiple applications such as dbPowerAmp and GoldWave.  It sorta worked, but some books got cut off a few minutes before the end.  Consistently.