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Two analogue window comparators and a logic section in 8 HP, for extracting gates and pulses from any signal. A regular comparator fires when a voltage rises above a threshold; a window comparator checks whether it sits between two levels. Each window is set by a shift knob, which moves it between −5 V and +5 V, and a size knob, which opens it from a few millivolts to 10 V, both under voltage control. Each comparator has complementary gate outputs and a big three-colour LED showing its state. Every input is normalised from the left comparator to the right, so one signal and one set of CVs can drive both, and a logic section combines the two outputs into AND, OR, XOR and flip-flop signals, each with its own LED. Complex rhythms, dual pulse width modulation, frequency division, voltage-controlled swing and logic with adjustable thresholds are all within reach.