At first I was like … em boring but the video made me want one really badly.
In the world of the Bliptronic, creating a song revolves around an ever evolving 4-beat pattern. Each row of vertical buttons represents the notes in one octave. Push a button to turn on a note, push the button again to turn off a note. Push multiple buttons in one vertical row to make a chord. The Bliptronic plays whatever you have selected in sequence horizontally across the display. When it reaches the end of the pattern, it repeats. The genius comes as you modify the pattern by turning notes on and off while the pattern is still looping to create evolving electronic melodies.
More info: Bliptronic 5000 LED Synthesizer