Remember the steampunk music sequencer? Here’s something even more lo-fi.

The Bubblegum Sequencer is a physical step sequencer that lets you create drumloops by arranging colored balls on a tangible surface. It generates MIDI events and can be used as an input device to control audio hardware and software.

The Bubblegum Sequencer senses the position of the balls through a video camera mounted underneath the surface. The captured image is processed by a computer vision routine that computes the average color in each hole. The colors are quantized and mapped to notes. For each note, a MIDI event is generated and sent to the operating system’s MIDI bus.

Watch the video for tips on getting more cowbell out of the sequencer.