BJF-designed envelope filter with smooth auto-wah sweep for funk styles.

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

Auto-wah envelope filter for guitar. Dynamic filter sweeps following your pick attack.

MK2 dual envelope filter with refined tracking and expanded sweep range. Two filters, infinite funk.

First-generation guitar envelope filter. Responsive tracking with multiple filter modes.

Sample and hold filter with random voltage for unpredictable textures.

Envelope filter in compact format with mode switch and adjustable sensitivity.

MFOS Echo Rockit clone with VCF, LFO, and external CV input. Modulated delay chaos.

Fixed wah filter pedal with adjustable frequency position for cocked-wah tones.

Rotary speaker simulator with authentic Leslie-style tones. Dual rotor simulation, adjustable speeds.

Loud, aggressive, experimental fuzz device - scream in Italian.

Compact dynamic waveshaper derived from the Dynamorph, creating envelope-controlled distortion that morphs with playing dynamics.

Crying wah and talking filter with optional fuzz, expression pedal controlled.

Touch wah with envelope-controlled filter. Auto-wah that sweeps based on pick attack dynamics.

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

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

Korg MS-20 filter clone with dual LP/HP resonant filters, six knobs, and CV inputs for modular use.

Multi-filter pedal with multiple filter types. From auto-wah to synth sweeps.

Modern take on the ultra-rare Systech Harmonic Energizer, delivering resonant filter and harmonic enhancement effects.

Expanded Q-Tron envelope filter with effects loop, blend, and HP/LP/BP mode selection.

Filter pedal with envelope and LFO modes. Auto-wah and synth filter effects.

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

Stereo 4-pole resonant low-pass filter with LFO modulation. CV and MIDI input, 9 presets, 200mA draw.

Prophet-5 SSM four-pole filter with envelope follower, 8-wave LFO, tap tempo, and self-oscillating resonance.