It's likely that you use MIDI every day in your studio or live production setup and workflow. Whether you're connecting MIDI hardware synths or drum machines to other hardware or software... or perhaps you're using MIDI over USB with the multitude of controllers available. Over 30 years since its inception and MIDI just continues. This standard still meets the connectiity needs for most of us.
So, seeing as how simple MIDI makes it easy to connect music hardware to other music hardware, it might not surprise you to know that one of the first ever first person shooter video games (released in 1987), MIDI Maze, took advantage of the popular protocol.
By today's standards, MIDI Maze is an incredibly simple-looking game. But at the time it was advanced and probably was the first example of death matches in video games. Characters were represented by simley faces - not unlike Pac Man - and the rest you can guess.
What's of interest is how MIDI Maze's multiplayer network required the use of the Atari's MIDI interface. In theory you could run up to 16 computers in a networked "MIDI Ring". You'd connect one computer's MIDI-OUT port to the next computer's MIDI-IN port. But more than 4 players often tended to slow the game down.
However, it did work, and became a cult video game that was spawned a generation of "death match" and "first person shooters". And it just shows what an incredibly flexible standard MIDI is and how it can be used in ways you might not expect.