M4B is a special format for iTunes audiobooks that may only be played on iTunes. There are also free converters that you could download from the Web designed to transform M4A files to MP3 or different audio file formats. Since they're free…

Free M4a to MP3 Converter can convert M4b to MP3 to make the information appropriate for your favorite MP3 participant. M4B is a file extension for an MPEG-4 half 14 audio layer audio e book container file format used by iTunes. An M4B fil…