MIDI MIDI
（重定向自MIDI messages）
![MIDI allows multiple instruments to be played from a single controller (often a keyboard, as pictured here), which makes stage setups much more portable. This system fits into a single rack case, but prior to the advent of MIDI, it would have required four separate full-size keyboard instruments, plus outboard mixing and effects units.](/Images/godic/202501/27/Synth_rack_@_Choking_Sun_Studio5651.jpg")
MIDI (/ˈmɪdi/; 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.