MIDI (Musical Instrument Digital Interface) is a widely used music file format that was introduced in the 1980s. MIDI files contain a sequence of musical notes, along with information about the instruments, tempo, and other musical parameters. Unlike audio file formats like MP3 or WAV, MIDI files do not contain actual audio data. Instead, they provide instructions for electronic instruments or software synthesizers to play back the music. MIDI files are highly versatile and can be used in a wide range of applications, from music production and live performance to video games and interactive installations.