Glurgle
A resonant filter effect inspired by the Oberheim VCF200
Glurgle
A resonant filter bank with a cutoff modulated by either a sampled and held noise source running at different speeds (as heard on Ship Ahoy by Frank Zappa), or an envelope follower.
Here’s a quick demo:
| Control | Parameter | Left LED | Right LED |
|---|---|---|---|
| Left knob | Cutoff/ centre frequency | ||
| Right knob | Speed (in sample and hold mode) | ||
| Encoder button (single click) | |||
| Encoder button (double click) | |||
| Encoder | Input sensitivity (in env follower mode) | green = sensitivity | |
| Left button | Low pass/ Bandpass | green = low pass; red = bandpass | |
| Right button | Toggles modes (env follower/ sample and hold) | red = env follower; blue = sample and hold |
Open the patch glurgle.pd in Plugdata to get an idea of how it works.
You can also flash the binary file directly to the pedal using the web interface (see the guide to flashing using the web.
Glurgle with tap tempo
This is a modification, without the envelope follower mode, that uses just the noise sample and hold mode. The right button taps a tempo, and the right knob then subdivides that tempo from 1 to 8 subdivisions.
| Control | Parameter | Left LED | Right LED |
|---|---|---|---|
| Left knob | Cutoff/ centre frequency | ||
| Right knob | Tempo subdivision of modulator | ||
| Encoder button (single click) | |||
| Encoder button (double click) | |||
| Encoder | |||
| Left button | Low pass/ Bandpass | green = low pass; red = bandpass | |
| Right button | Tap tempo | green = tempo |
Patch: glurgle_taptempo.pd
Binary: glurgle_taptempo.bin
Plugdata compile settings
Big + SDRAM.