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Maddie MOD1
Butterfly
Chaos · Modulation
A Lorenz-attractor chaos source for organic, non-repeating CV — chaotic, but never random.
- Width
- 4 HP
- Depth
- 28 mm
- Power
- +12V
- MCU
- Arduino Nano
- Controls
- 3 pots · button · LED
- I/O
- 4× 0–5V jacks
Overview
Butterfly runs a Lorenz attractor — the system that inspired the famous “butterfly effect” metaphor, where tiny changes lead to dramatically different outcomes. It produces organic, non-repeating CV movement that feels alive without ever being truly random.
The three knobs shape the attractor’s parameters, and the three CV outputs trace its X, Y, and Z axes. A trigger input resets the system, and a slow mode stretches the motion out for glacial modulation.
Panel & I/O
| Control | Pin | Function |
|---|---|---|
| POT1 | A0 | Sigma — flow strength (x/y equalize + step size) |
| POT2 | A1 | Rho — divergence (calm → chaos) |
| POT3 | A2 | Beta — damping (z growth/decay) |
| BTN | D4 | Normal / slow mode |
| LED | D3 | Blinks at step rate |
| F1 | A3/D17 | In — Trigger (reset) |
| F2 | D9 | Out — X axis (PWM CV) |
| F3 | D10 | Out — Y axis (PWM CV) |
| F4 | D11 | Out — Z axis (PWM CV) |
Features
- Deterministic chaos — organic motion that never exactly repeats
- Independent X / Y / Z CV outputs for three related-but-distinct modulations
- Trigger reset to re-seed the system
- Slow mode for ambient, drifting movement
© 2026 Maddie Synths · firmware based on work by Rob Scape · original firmware MIT · hardware design by Hagiwo