MIDI – Musical Instrument Digital Interface – is a protocol that lets, well, musical instruments interface digitally. Basically, it’s a way of sending messages back and forth between keyboards, synthesizers, computers, and other noise-making machinery. It’s been around since the early 1980s and is supported by a huge range of hardware. While it is standard, there are a few different physical connections. We’re going to be using USB here, but there is also a specific connector just for MIDI that some older hardware may expect.
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