Convert Multiple MP4 Files To MP3 Files Software - Version 7.0 This software offers a solution to users who want to convert one or more MP4 audio/video files into MP3 audio format. The user chooses the files or an entire folder to be processed before starting the conversion. There will be no audio quality loss during the conversion; the bit rate used to create the new MP3s will be the same as the bit rate of the original MP4s. Using this time saving software, even large numbers of files can be handled with one click.