"For those of you interested in how I hooked up Makey Makey to MIDI, I thought I would give you a few different ways. It's all about hooking up keyboard presses to MIDI, and then having Makey Makey trigger keyboard presses. Here are a few examples:
1. Easiest - Most audio software programs like Reason, Logic, Garage Band, etc. have a 'keyboard' mode, where your computer keyboard can trigger MIDI notes.
2. Moderate - download a special keyboard-to-midi software like midi keys (for the mac) located here: http://midikeys.en.softonic.com/mac There are many other programs that do this easily as well.
3. Expert - write your own code that makes keyboard presses trigger MIDI notes! Eric Rosenbaum hacked this one together at Maker Fair in a language called 'processing'. He shared it with me, and it can be found here: https://ccrma.stanford.edu/~beau/bana... I hooked this up to a vibraphone in Reason."