Beat Bowl

Beat Bowl is a collaborative MIDI instrument built from my love of DJing and VJing—the simple, tactile joy of twisting knobs and sliding faders. I wanted to create something anyone could play, no music background required: just turn a dial or push a button and hear the track change.

I built it as a four-sided pyramid, so up to four people can crowd around, each with their own playful set of controls. The layout’s intentionally a little chaotic—think of the sci-fi consoles you want to touch just because they look fun. Each panel lets you shape a part of a techno track: one might control the kick drum’s sound, another flips up patterns or effects, and others mess with synths or arpeggiators. I even left some mystery in; part of the fun is just discovering what everything does.

Process

Getting all the multiplexers to talk to a single Arduino Pro Micro was a small victory by itself. I had to find out the hard way that you really need to “star” all your grounds together to stop weird interference between the controls. At one point, turning a single knob would cause the others to jump around—super confusing, but also kind of hilarious if you weren’t trying to demo it. It took a separate 12V power supply to make things stable enough for everyone to play at once.

Mapping the controls in Ableton Live and seeing the software instantly respond to each new knob or button was a genuinely magical moment.

User Experience

Most folks had no idea what each button or knob was supposed to do, but that became part of the fun. There was a lot of laughter and experimentation, and it turned into a kind of social game. Even though it’s still very much a prototype, the core idea came through: make music playful and accessible, even if you have no clue what you’re doing.

If I keep developing this, I’d want to make each panel’s role even clearer, but for now I’m happy it made people want to sit down and just mess with sound together.

Tools & Technologies

• Arduino Pro Micro (ATmega32U4, native USB MIDI)
• Multiplexers for analog/digital expansion
• Custom wiring and prototyping
• Ableton Live MIDI mapping
• Fusion 360 (enclosure design)
• 3D Printing
• Ultrasonic distance sensor