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Maddie MOD1
Random Walk + Lag
Random · Modulation
An ultra-slow random walk with a lagged second output for ambient, crossfading textures.
- Width
- 4 HP
- Depth
- 28 mm
- Power
- +12V
- MCU
- Arduino Nano
- Controls
- 3 pots · button · LED
- I/O
- 4× 0–5V jacks
Overview
An ultra-slow random walk locked to a gentle frequency range, with a second output that lags behind the first. The two outputs dance around each other for ambient crossfading textures. The button toggles between classic Random Walk and a Gravity Mode that slowly pulls the output back toward zero. The lag-amount CV sets how tightly the second output tracks the first.
Panel & I/O
| Control | Pin | Function |
|---|---|---|
| POT1 | A0 | Rate — how often new steps occur |
| POT2 | A1 | Bias — output offset |
| POT3 | A2 | Chaos — step size / depth |
| BTN | D4 | Random Walk / Gravity mode |
| LED | D3 | Output indicator |
| F1 | A3 | In — Lag amount CV |
| F2 | D9 | Out — Lagged walk |
| F3 | A5 | In — Chaos depth CV |
| F4 | D11 | Out — Random walk (main) |
Features
- Two related outputs — main walk plus a lagged follower
- Random Walk and Gravity (return-to-zero) modes
- CV control over lag amount and chaos depth
- Tuned for slow, evolving ambient modulation
© 2026 Maddie Synths · firmware based on work by Rob Heel · original firmware CC0 1.0 · hardware design by Hagiwo