Yes, it's a real mutable instruments blinds!  Still one of the better voltage processors out there!

Blinds is a 4-channel voltage-controlled signal polarizer - bipolar VCAs

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.

A hub for your modulations

• 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.
• “S/he who can do more can do less”: each channel can be used as a plain VCA.

Specifications:

6HP
+12V:10mA
-12V:1mA
25mm deep

Mutable Blinds Manual

 

NOTE: This is a used item and may shows signs of cosmetic use but is guaranteed to be fully functional.