Effect unit for guitar, bass or keyboard. Classic Funky envelope filter effect with pitch-following feature.Designed by AzTech Design in Canada
EPF-19 is one of a few frequency-following circuits that I devised whilst exploring analog computing (seen here) which was begging to be applied to music. The circuit consists of a voltage-controll...Read More…
EPF-19 is one of a few frequency-following circuits that I devised whilst exploring analog computing (seen here) which was begging to be applied to music. The circuit consists of a voltage-controlled filter that is set up to follow either/both the amplitude and frequency of signals presented to the input.
Standard Guitar input/output jacks
Rugged stomp switch
wide range "sensitivity" and "Q" control knobs
"Lock" switch that controls pitch-following
Hand-crafted aluminium enclosure designed for quick and easy access to the battery and components on the PCB
Blue indicator LED
DC input: 9V Battery < 1mA
Frequency response: -6dB/Oct Below 7Hz and above 6kHz
Filter range: 170Hz to 2.8kHz (unmodded)
This was my first exercise in getting a smooth assembly line running, which I learned a lot from. I'm treating it as a fundraiser for my home lab.
I'm very proud of the performance of this pedal. It goes from very subtle, to classic funk, to crazy synth sounds with the turn of a knob. Also, the unique and original pitch-following design creates another dimension of possibilities. Every unit is hand machined and assembled by me, in Canada, and comes with a manual, schematic, list of mods that I've been playing around with and, of course, a signature.
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