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"The Wiard modules form an integrated analog modular synthesizer system. They are intended to be used as a set. There is no problem interfacing them to existing equipment, but they are designed to provide a synergistic set of functions when used together. The designs incorporate virtually every operating feature from every modular designed to this point. In addition, quite a few new features have been developed that are not available from any other system. Many features have been taken from dance music technology and married with features from the avant-garde.
The "Super VCA" developed for the Wiard -- the Mixolator -- is a switchable two or four quadrant multiplier. Four quadrant multiplication is also call "balanced modulation" or "ring modulation"
This module contains two identical units. It begins with a high quality DC coupled dual input VCA with individual volume controls (labeled X1 and X2). A "Y" input and output are included so that any combination of mixing, panning, crossfading, gain control, phase inversion and ring modulation are possible. The voltage control curve of each VCA is smoothly pannable from linear to logarithmic response. The output of the each VCA is displayed on a four LED VU meter.
The Mixolator module contains:
* Two Multi-function circuits that provide VCA, crossfade, seque and balanced modulator functions
* A jack multiple
http://www.wiard.com/support/Mixolator.pdf"