This format file contains a series of instructions that the synthesizer or other sound generator uses to play the music in real-time. MIDI means Musical Instrument Digital Interface, and it let computers, synthesizers, sequencers, controllers, and other musical devices communicate and share information. Free Convert MIDI File to MP3 Using iTunes In this case, we will convert MIDI to MP3, showing you the full process with simple steps. We want to recommend 2 different ways to convert your files. It is time to look for the specifications and try to come up with a valid format for then ask the same question to yourself, and now how do I convert this file into a valid format? Do not worry because here you will find all the answers you were looking for. One of the situations that can bother users is having a file that does not recognize by their media player. 2.38 Video to MP3 Apps for iPhone and Android.2.36 Video to MP3 Converters for iPhone.1.13 Convert MP3 to Windows Media Player.