Blinds is a 4-channel voltage-controlled signal polarizer.

Each channel consists of a polarizer circuit, also known as a four-quadrant multiplier. This circuit acts like a VCA, except that a negative control voltage will cause the output signal to be inverted, instead of being silenced.

Blinds’ outputs are daisy-chained, allowing adjacent groups of 2, 3, or all 4 channels, to be mixed together.

Key Features:

• Scale, invert and offset up to four modulation signals.
• Mix up to four CVs or audio sources.
• Multiply (ring-modulate) two audio sources, with adjustable carrier rejection.
• “who can do more can do less”: each channel can be used as a plain VCA.

Specifications:

• All inputs DC-coupled.
• All inputs handle audio-rate signals.
• Input impedance: 100k for all inputs.
• CV offset range: +/- 5V.
• Gain scale: linear, a +5V CV translates to a gain of 1.
• Gain range: +/- 2.

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