You can also use these applications to export MIDI files into other formats like MP3 or WAV. However, you should be able to play MIDI tracks with most music recording and editing applications, such as GarageBand and Audio Evolution Mobile, as well as with VLC Media Player. MIDI is predominantly designed for musicians and producers to create or edit music or audio tracks, and so MIDI files can't be played by all media players. The format’s smaller file sizes make it ideal for sharing music online. MIDI files don’t contain an actual audio recording, but instead contain data about how the sound should be produced by a compatible playback device or software program, including the notation, pitch, speed, volume and tempo of each instrument. The name MIDI stands for Musical Instrument Digital Interface, and the standard was launched in 1983. How to Convert MIDI to MP3 Click Choose File. MIDI is a file format for creating, sharing and playing digital music. MIDI to MP3 converter is a free online tool to convert your MIDI files to MP3 format.