One Control Butter Yellow Auto Quack - Demo by Erik Holmbom

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Overview
Is an envolpe controlled filter. This type of filter is controlled by the dynamics of playing.BYAQ is a resonant filter,the center frequency of which moves upward with as you strike a note harder. The filter takes the intitla transient of a plucked note and then follows the decay of the noteso that filter centerfrequency moves up at the peak and then falls by the ratio of the decay
History of effect
Since envelopefilters are controlled by strength of input signal hsitorically famous users of envelopefilters have connected the control input directly to guitar or bass pick up and others used compressors or volume control on instrument to equalize the value of notes through out fretboard. Envelopefilters are also common in analog synths.
Historically most envelope filters were designed for keyboards to cover the complete range of the keyboard. BYAQ is adapted to the range of electric guitar and electric bass and has therefore a more narrow range. The heart is a resonant filter similar to a wha however BYAQ has a Mellow/Bright switch that sets the range of the filter.
There are a number of problems with use of envelope filters on guitar and bass which the BYAQ attempts to solve: partly filter range is often too wide and therefore BYAQ has a range switch; filters often rest at very low frequency and the BYAQ is made to rest at about transparent level: this allows having BYAQ on for a seethrough effect until a transient triggers filter to move. The starting frequency can be set with Bias control so that even small movements i.e. mini-whas can be created on each plucked note.

[@benharris5210]

Excellent playing. I don't play a great deal of funky type riffs, but i've been wanting a small "quack style filter" for spicing up solos and snappy clean riffs. This thing sounds excellent for the price and size, when compared to much pricier pedals.

[@markl2757]

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[@Kangaroock]

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