Synthrotek Quadrangle is an envelope module for modular synthesizers in Eurorack format. The module is based on four cascaded envelope generators, each with its own bipolar output. Each of the individual channels of the Synthrotek Quadrangle allows the parameters Attack, Decay/Release, End Of Attack (EOA), End Of Cycle Trigger (EOC) to be controlled via CV. The parameter EOC is normalized to the next gate input, resulting in interesting rhythmic possibilities. All attack and decay/release parameters of the module can also be controlled via the All A and All D/R inputs. The fourth channel also has a toggle switch for switching between a"One Shot" cascaded envelope and a periodically scrolling envelope. The output sums up the individual channels and is also bipolar.
Synthrotek Quadrangle at a glance:
Four cascaded envelope generators
Attenuators for every output
Attack, decay/release and loop modes per channel
CV control via Attack, Decay/Release, ALL Attack and ALL Decay/Release