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Maddie MOD2
MOD303
Bass · Sequencer
An 'acid' 303-ish bass voice with a built-in Turing-style generative sequencer.
- Width
- 4 HP
- Depth
- 28 mm
- Power
- +12V / −12V / +5V
- MCU
- Seeed XIAO RP2350
- Controls
- 3 pots · button · LED
- I/O
- 2 gate in · 1 CV in · PWM audio out
Overview
“ACIDWALK303” is a 303-style bass voice with a generative sequencer baked in. POT1 crossfades from a locked 8-step pattern, through total randomness, to a locked 16-step pattern — a Turing-machine-style probability control. Clock it externally and it walks, mutates, and accents on its own.
Panel & I/O
| Control | Pin | Function |
|---|---|---|
| POT1 | A0 | Turing — randomness + length (8-step ↔ random ↔ 16-step) |
| POT2 | A1 | Decay — amp decay + bite (accent extends it) |
| POT3 / CV | A2 | Transpose — quantized semitones |
| IN1 | GPIO7 | In — Clock (rising edge advances) |
| IN2 | GPIO0 | In — Accent hold |
| BUTTON | GPIO6 | Short = scale · double = waveform · long = regenerate |
| OUT | GPIO1 | Out — PWM audio |
| LED | GPIO5 | Step / accent / slide blink |
Features
- 303-flavoured bass voice with slides and accents
- Built-in Turing-style generative sequencer
- Locked 8/16-step or fully evolving patterns
- Quantized transpose, switchable scale and waveform
© 2026 Maddie Synths · firmware based on work by the HAGIWO MOD2 community · original firmware Open source · hardware design by Hagiwo