Convert Multiple M4A Files To MP3 Files Software - Version 7.0 This software offers a solution for users who want to convert many M4As to MP3s. Many songs purchased from iTunes are in M4A format which makes them difficult to play with MP3-only devices. This software solves this type of problem by converting those M4A files in batch. Simply drag and drop the files you would like to work with and click the 'Start' button to begin the conversion.