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In-browser flashing works in Chrome or Edge. ⚠️ Disconnect Eurorack power before connecting USB.
Hold BOOTSEL on the module while connecting USB, then click Flash and pick the RP2 device.
Maddie MOD2
Radio Sampler
Sampler
A long-form sampler for vocals and speech — up to ~130s with variable speed and direction.
- 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
A long-form sampler built for chopping vocals, speech, and podcasts into techno — up to about 130 seconds of audio at 36.6 kHz. Scrub the start position, pitch-shift with variable speed, and flip playback forward or reverse. Linear interpolation keeps the pitch-shifting smooth.
Panel & I/O
| Control | Pin | Function |
|---|---|---|
| POT1 | A0 | Speed (0.5–1.5×, with pitch shift) |
| POT2 | A1 | Direction (forward / reverse) |
| POT3 / CV | A2 | Start position (0–100%) |
| IN1 | GPIO7 | In — Trigger (rising edge) |
| IN2 | GPIO0 | In — Loop toggle (HIGH = loop) |
| BUTTON | GPIO6 | Manual trigger |
| OUT | GPIO1 | Out — 10-bit PWM audio (~36.6 kHz) |
| LED | GPIO5 | Trigger indicator |
Features
- Up to ~130 s of audio in flash
- Variable-speed pitch shifting (0.5–1.5×)
- Forward / reverse playback
- CV-controllable start position for live scrubbing
© 2026 Maddie Synths · firmware based on work by Hagiwo · original firmware CC0 1.0 · hardware design by Hagiwo