I’m no musician, but lately I’ve been experimenting with MIDI (Musical Instrument Digital Interface) in my projects. MIDI is a standard for controlling instruments that works by passing messages between pieces of connected equipment. The messages aren’t actual music in the same way as, say, an MP3 is. Instead, they are commands for making music—“Play middle C on an electric piano,” for example.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.