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BURAN ELECTRIX / WEB EXPERIMENT
THE ORIGINAL 1-BIT GROOVEBOX · RECREATED FOR YOUR BROWSER

LUNCHBEATPCB

Press the buttons. Turn the pots. Make some gloriously crunchy noise. A playable browser adaptation of Jan Cumpelik's 2013 Lunchbeat firmware and PCB.

Connect your Lunchbeats

Each new Lunchbeat has its own sounds and pattern. Virtual trigger cables connect the boards in sync, just like a hardware chain.

1 Lunchbeat
Mobile mode: a single full-size, touch-friendly Lunchbeat. Want to connect more? Use a computer.

About this recreation. The synthesiser logic is adapted from Jan Cumpelik's Lunchbeat PCB v1.31 C firmware (2013–2014) and aims to recreate its four 1-bit voices, 3-bit summed output, original eight-step sequencing and edit/setup controls. This is a browser emulation, not a cycle-accurate AVR or analogue circuit simulation; your browser's audio hardware and filtering will sound somewhat different. The visually inspired PCB is an original HTML/CSS illustration, not the original manufacturing artwork. Sound-algorithm port: GPL-3.0, with author attribution preserved; hardware design by Jan Cumpelik, CC BY-SA 3.0. Original PCB repository ↗ · GPL v3 ↗. Everything runs locally; no samples, server or external JavaScript needed.