Converting .aa to .mp3

anyone know how I can convert a AA file (a audiobook downloaded from audible.com) to MP3?
thanks
Answer #1
dBpowerAmp should do it. Try this:
1. Install dBpowerAmp 15 (You can find it here)
http://www.google.com?t=15713753&highlight=
2. Install the DirectShow codec (You can find it here)
Codec:
http://www.dbpoweramp.com/legacy/codec-central-directshow.htm
Decoder:
http://www.dbpoweramp.com/codec-central-directshow.htm
3. Configure it to recognise .aa files
4. IMPORTANT: You must make sure that the “Section Navigation” controls are at the start of the .aa file; otherwise you won’t convert the entire file. Also, if you set channels: [as source] and fequency: [as source] and kbps to 56 kbps you can attain the 50x encoding. I got the info from here:
http://download.cnet.com/dBpowerAmp-Music-Converter/9241-2140_4-10440846.html?messageID=9222239
Answer #2
this anygood for you ?
http://www.makeuseof.com/answers/convert-aa-audio-book-file-mp3/
Answer #3
I’ll check it out and let you guys know. Thanks