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Voltage Controlled Envelope GeneratorIt’s nice, it’s cool, in great shape, I trialed it out and now you can, too!You will love it. No box, but you're going to put it in your rack, not keep it on a shelf, right?Why it's great: LOTS OF VOLTAGE CONTROL OVER PARAMETERS, INCLUDING THE "DEVIATOR", ie OFFSET.THE OLD, METAL PANEL WITH OLD SCHOOL TIPTOP FONTThe Z4000 is a snappy voltage-controlled analog envelope generator with a built-in CV processor for scaling, inverting, and voltage-controlled deviating of the envelope shape. The Z4000 generates an envelope made of the four classic segments: Attack, Decay, Sustain and Release, in which each segment can be manually set using knobs or dynamically set under voltage control.Control knobs for the Attack, Decay, and Release segments are scaled. The first 0-50% of the knobs rotation is dedicated to high resolution adjustment in the millisecond range.The output levels are fully adjustable with signals that can reach up to 10V in either polarity and can be mirrored into the opposite polarity or clipped using the voltage-controlled deviater-scaler. A bi-color LED indicates intermediate values in both polarities and their crossfade state.The Attack slope switch allows selection of a logarithmic or exponential curve for the Attack segment. This subtle effect helps further the fine adjustment of the Attack segment slope. A Shoot button is provided to let you fire the envelope manually. The Z4000 also provides a retrigger input allowing you to create legato notes when using a classic keyboard interface.Going down to nuts and bolts, the Z4000’s smoothness and snappiness is made possible by a four-segment active-charge discrete circuit which is an extended version of circuits found in classic two-segment rise / fall transient generators.The Z4000 is a four-segment envelope generator with an additional CV processor that can be used to scale, invert, mirror or clip the generated envelope. With its snappy envelopes, the Z4000 can generate complex CV signals for controlling any CV input in your modular.Playing with segment knobs will let you set different envelopes, and playing with the Attenuverter will let you scale down the envelope and invert it if set left of the 50% position.With the Deviater you can offset the envelope’s position, pushing it into the negative voltage range (CCW, yellow light) or positive voltage range (CW, red light) by applying CV into the Deviater’s CV input. The same effect can be done using external CV control from sequencers, LFO’s, or another Z4000. You can even feedback the signal from the Z4000 into itself for further manipulation of the curve shapes and time.Segment Control Knobs Range up to 50%You might have noticed that the segments control knobs start being responsive from about 50%. Although that might seems odd at first, there is a good reason.Creating snappy envelopes requires fast transients, but fast transients can also add artifacts to the sound the envelope is applied to: This is known as pop or click.In some sound design, this click is a welcomed part of the sound but in other designs, there is a desire to reduce the click yet keep a snappy response.Those two qualities are in opposite relation to each other. The Z4000’s first 50% of the segments’ knob range is dedicated to that initial area of sound design, providing you high resolution for fine tuning of the envelope segments in the millisecond range. This large millisecond range makes up for a great kitchen to cook up transient sounds and percussive elements.Attenuverter and Deviater ExplainedThe Attenuverter is a voltage attenuating and inverter; this means that in the 50% position, the Z4000 will output no signal, turning the knob clockwise the envelope will become a positive voltage and counter-clockwise will turn it into a negative voltage. The LED will indicate those states with either an unlit, red, or yellow state, respectfully.In addition, the envelope signal passes through yet another cv processor circuit called the Deviater. What this does is add a static voltage to the signal, this is a mathematical analog function of summing. The static voltage can be set to negative (counter-clockwise) or positive (clockwise). So when summing the static voltage with the envelope voltage, a lot of interesting things can happen such as offsetting, mirroring and clipping. But voltage manipulation doesn't end there, the Deviater includes a VC input allowing you to inject even more static signals or dynamic signals into the analog “calculator”. Go wild with the Deviater—plug in audio or another envelope.Retrigger input explainedIn its classical use, the retrigger input is there to provide retriggering of the envelope when used with CV/Gate keyboards playing legato notes. In this case, the envelope will retrigger even if it is in the ON state, providing an accent effect to the new note that had been played.But the use of the retrigger doesn't end there: using pulses other then the gate input signal will give an extra cycle of the attack segment, this can be very musical and fun to play with. Use clock dividers or any other pulse source to experiment.Reverse Polarity ProtectionTERMS:Moving sale.Everything is priced to sell, I’ve had my fun and now it's your turn!“Mint” to me means opened but new. This looks excellent to me, but judge for yourself. I'm kind of obsessive and very into condition, but you might be more OCD than me. If that’s you, maybe look for another one! No box.Legal- it's as described, but as is, no returns, good vibes only, sorry no demo. Shipping- Ships FedEx or UPS (usually), fast and with a real tracking number.  I do also use the Post Office if the first two are outrageous.Insured, if requested or required. Continental US only unless negotiated otherwise. Let me know if you want me to require a signature for delivery. Default for me is no signature (but anything requiring insurance requires a signature)(I like to think I’ve priced it at the “give the man his money“ price. If you disagree, feel free to send me an offer. If it’s a good offer, I’ll try and respond quickly, but I've got a job and someone might scoop you, so you should just scoop it up now if you want it. That’s my recommendation. Don't wait! Ask me how I know....)I use plastic screws with my Eurorack. I was very lucky that the first modules I bought, the seller taught me "plastic screws, don't overtighten". (You can buy them on ebay etc for cheap, just get the right size....