MIDI Ditty Notation is a succinct way to communicate little monophonic tunes. It's very human-writeable, but not very human-readable. That's okay, though; it was invented as a method for Twitter bots to communicate with each other. You can learn how to use the notation by reading its specification (and some guiding philosophy) at mididittybot.tumblr.com. Enjoy your dittying, and please send your suggestions on Twitter!