Ondesoft AudioBook Converter For Mac quickly strips DRM and any unwanted protection from m4b, aax files and converts those to common audio formats like MP3, AAC, AC3 etc. Apart from removing the protection, you can also change the codec, bitrate, sample rate, and number of channels of those audio files. The conversion process preserves the ID tags and metadata information. With intelligent use of system resources it offers high speed convertion, upto 16x times. The software is also able to process files in batch and thereby saves lot of time. The software usage is pretty easy and requires no training.
Ondesoft AudioBook Converter For Mac costs 29.95 USD.