Music theory for people who make music

Thirteen stops, from a single note to a finished arrangement. Each one is an instrument you can play, a short explanation, and drills that adapt to you.

Headphones help. A MIDI keyboard helps too, but the on-screen keys and your computer keyboard work fine.

Sound starts when you press a button. Arrow keys move between stops; Escape stops the sound; Shift+M mutes. Nothing is saved between visits except the volume.