16 filter and synth models including envelope followers, talk boxes, and ring modulators.

Voltage-controlled low-pass envelope filter with sweep direction, resonance, and switchable range.

Compact auto-wah with Sensitivity, Bias, Resonance, and Decay controls under a flip-top cover.

Dual-envelope filter with extensive parameter control and independent high/low filters.

Auto-wah envelope filter with funky quack and dynamic response.

Optical envelope filter with HP/BP/LP modes, Q control, and touch-sensitive dynamics.

Analog envelope filter with four controls: Sensitivity, Tone, Decay, and Q resonance. Works on guitar and bass.

Envelope filter that sweeps a resonant filter based on your pick attack. Auto-wah for funk rhythm and lead work.

Envelope filter with resonant lowpass and multiple modes.

Dual-section analog envelope filter meets gated octave fuzz -- pure synth madness.

Touch-sensitive envelope filter and auto-wah with LFO and envelope modes and three filter types.

Dual low-pass envelope bi-filter with Color blend control. Forward and reverse sweep directions.

Legendary downward-sweeping envelope filter from 1973 by Craig Anderton with voice-like synth response for funk and bass.

Frostwave Funk-a-Duck clone. Resonant envelope filter with deep funk and synth-like sweeps.

Mu-Tron-style optocoupler envelope filter with voltage doubler for extra headroom and three filter ranges.

Hand-wired bass-optimized Snow White AutoWah. BJF envelope filter voiced for low frequencies.

Envelope filter with harmonic density engine, LFO, 4 filter modes, CV patch bay, expression—400mA/9V, 124x99x61mm.

Dual envelope filter with two independent filter sections. Stack up and down sweeps for complex bass funk.

Danish envelope filter considered the world's best auto-wah, Pino Palladino approved.

Lovetone Meatball clone. Dual-mode envelope follower and triggered filter with deep controls.

Updated Danish envelope filter legend, refining the world-class auto-wah formula.

Envelope filter with HP/BP/LP modes, dual frequency range and switchable sweep direction.

Envelope filter with funky quack character. Auto-wah with the Fuzzrocious attitude and hand-built charm.

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