Patterns squelch across the TFT as the kick locks in and the bassline starts to bite. Acid Drip is a compact DIY groovebox that puts a full acid bass synth and a sample-based drum machine on a single RP2040 brain, all driven by the Mozzi audio engine and a hands-on 16-pad interface.
The Acid Drip pairs a monophonic virtual-analog acid voice with a 16-step sequencer and 3 dedicated pots for cutoff, resonance, and decay, giving you classic lowpass filter squelch with live-tweakable accents. A 320×240 ILI9341 color display keeps riffs, patterns, and step programming visible at a glance, while Cherry MX switches deliver fast, confident triggering for bass and beats alike.
On the rhythm side, an integrated drum engine with preset patterns for techno, house, hip-hop and more runs alongside the bassline, with per-step performance effects like octave jumps, retriggers, stutters, and scale-based pitch moves assignable directly from the pad grid. Separate 3.5 mm outputs for the acid synth and drums plus switchable clock sync on the drum jack let Acid Drip sit comfortably in a hybrid or hardware-only rig. Designed as open-source DIY hardware, it invites you not just to play patterns, but to hack, customize, and evolve the box itself into your own signature acid machine.
