Did you know there’s a widely-supported browser API that allows you to interface with a wide variety of hardware, including some you can build yourself? Wonder no more and meet the WebMIDI API! We’ll look at how MIDI — a niche protocol from 1983 designed for electronic musical instruments to talk to one another — JavaScript and “tiny computers” like the Arduino, Espruino and RasperryPi can be used to build interactive, non-musical experiences that straddle the line between the web and physical world.