Buyer Beware - Use .aax format not .aa format
Buyer beware - After a month's labor converting all the books in my Audible Library (>250), I discovered that the SW cuts off the last 3-18 sec of some chapters. After communicating with a tech rep I was told that this sometimes happens with .aa files but not with .aax. This work-around does appear to work for the .aax files I checked. So if you have your Audible files in .aa format you'll have to re-download them as .aax files then convert them to mp3 files (Don't know if this is a problem for m4b files.) The tech rep got a bit sassy when I asked for a partial refund. Sorry I invested in this company's SW. Slower products from other companies are likely more reliable. Addition: Recently discovered that the SW cannot handle the .aax files if the titles are too long - above about 100 characters. Just copy the Audible files to a new folder, edit out all those crazy characters Audible puts at the end of their files and convert the files with the shortened titles. If you want all those characters then buy better SW.