MIDI (; short for Musical Instrument Digital Interface) is a technical standard that describes a protocol, digital interface and connectors and allows a wide variety of electronic musical instruments, computers and other related devices to connect and communicate with one another. A single MIDI link can carry up to sixteen channels of information, each of which can be routed to a separate device.

Midi or MIDI may refer to:

• MIDI (Musical Instrument Digital Interface), an industry-standard electronic communications protocol
  • Black MIDI a genre of music that uses MIDI protocol files
• Beijing Midi School of Music, a music school in Beijing, China, established in 1993
• Midi Hi-Fi, an integrated Hi-Fi system
• Midi Maxi & Efti, a Swedish musical group with African influences from the early 1990s
• Midi Music Awards
• Midi Music Festival
• Speed/Midijunkies, a song by Atari Teenage Riot