Envelope filter based on the legendary Guyatone WR-3, with added controls for range, gain, and guitar/bass voicing.

DIY PCB for building a Lovetone Meatball clone - the heavily tweaked Mu-Tron III envelope filter with blend and loop.

Envelope filter from the Maestro relaunch. Touch-responsive auto-wah with sensitivity and range controls.

Analog guitar synth with VCF, VCA, sub-octave, and pulse waves. Spans auto-wah to pseudo ring-mod.

AF-9 auto-filter variant with slider controls instead of knobs. Same envelope-following circuit, visual layout.

Korg MS-20 dual resonant filter and preamp in pedal format. CV and expression inputs, self-oscillates.

Triple-band envelope filter for funky auto-wah bass effects. Three simultaneous filter sweeps.

Dual-function pedal combining cocked wah voicing with additional effect.

Hard-clipping distortion with Soviet D312A germanium diodes and cocked-wah filter. Limited to 165 units.

Envelope-following auto-filter from the 9-series. Dynamic wah sweeps that track your pick attack intensity.

Four-step sequencer creating rhythmic filter patterns. Automated modulation.

The Echoes squawk in pedal form. Backwards wah circuit reproducing Gilmour's famous feedback effect.

4-pole resonant lowpass filter with expression input. Monstrous dub bass to synthy sweeps.

JFET/silicon fuzz with MS-20-style LM13700 low-pass filter and expression input.

Envelope filter with sample and hold mode. Funky auto-wah plus random steps.

Frostwave Blue Ringer clone. Voltage-controlled ring modulator for metallic, inharmonic textures.

VCA compressor with envelope filter, band boost, overdrive, and CV patch points.

Aggressive envelope filter with sinister tonal character.

Modulated filter with adjustable LFO speed and depth. From subtle envelope motion to extreme sweeps.

Analog optical wah/filter with Auto, Fixed, and Envelope modes. Expression pedal acts as traditional wah in Fixed mode.

Analog ladder filter inspired by classic Moog synthesizer circuits, delivering throaty, resonant filter sweeps for guitar and bass.

Parametric EQ with tilt and CV control, sweepable filter from subtle shaping to dramatic voicing.

Dual-channel envelope filter/wah and octave for funk and soul with two filter modes and expression input.

1970s MXR Envelope Filter rebuilt with emphasis knob, up/down switch, and true bypass.