Musician Maker is a system to allow novice players the opportunity to create expressive improvisational music. While the system plays an accompaniment background chord progression, each participant plays some kind of controller to make music through the system. The program takes the signals from the controllers and adjusts the pitches somewhat so that the players are limited to notes which fit the chord progression. The various controllers are designed to be very easy and intuitive so anyone can pick one up and quickly be able to play it. Since the computer is making sure that wrong notes are avoided, even inexperienced players can immediately make music and enjoy focusing on some of the more expressive elements and thus become musicians.