Since the existence of computers, developers have been working on ways to make music that is compatible with technology. Combining the digital world with the musical world has opened up many new opportunities. One of them being the ability to create beautiful music without needing to know how to play a single note on an instrument.
NodeBeat HD is one such app that allows users the ability to control and manipulate objects on the screen that will pulse rhythmically and change pitch as you move them around. No music theory necessary.