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Maddie MOD2
HiHat
Drums · Percussion
A white/blue-noise hi-hat with adjustable decay, decay curve, and band-pass frequency.
- 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 noise-based hi-hat built on white and blue noise sources. Dial in the decay time, the shape of the decay curve, and the band-pass frequency. A short button press triggers manually; a long press toggles the noise type. The LED follows the envelope.
Panel & I/O
| Control | Pin | Function |
|---|---|---|
| POT1 | A0 | Decay time |
| POT2 | A1 | Decay curve |
| POT3 / CV | A2 | BPF freq |
| IN1 | GPIO7 | In — Trigger |
| IN2 | GPIO0 | In — Accent (level drops when HIGH) |
| BUTTON | GPIO6 | Short = trigger · long = noise select |
| OUT | GPIO1 | Out — PWM audio |
| LED | GPIO5 | Envelope follower |
Features
- White and blue noise sources
- Adjustable decay time and curve shape
- Band-pass frequency control
- Accent input and LED envelope display
© 2026 Maddie Synths · firmware based on work by Hagiwo · original firmware CC0 1.0 · hardware design by Hagiwo