Sorry.. None of our converters can convert these formats... :(
Sorry! We were unable to find any converter site or software that matches your search: 'convert audio: m4b to mp3pro'. We are constantly on the lookout for new converters so please check again later or request that we add this file-format to our service here.
In addition the relevant M4A file, a M4B format is a M4A file that can be bookmarked and are therefore better used for audio books and podcasts. This MPEG-4 Audio file is a layer file that is becoming the new standard for audio compression and is often used as the audio in MPEG-4 movies. Learn more about m4b