Tiptop Audio Z4000 black is an envelope module for modular synthesizers in Eurorack format. The module generates a classic 4-pole envelope, where each segment can be adjusted manually with knobs or dynamically under voltage control. The first 0-50% of knob rotation is provided for high resolution adjustment in the millisecond range. By means of an attack slop switch the attack curve can be logarithmic or exponential. In addition, a CV processor is included for scaling, inverting and voltage-controlled deviation of the envelope shape. The output levels can reach up to 10V in any polarity, be mirrored to the opposite polarity or be truncated with the voltage controlled devater scaler.