The Intellijel Quadrax consists of four independent, CV-controllable channels, each of which can be configured to perform any one of the following functions: an AD (Attack, Decay) envelope an AHR (Attack, Hold, Release) envelope a cycling envelope (resulting in a unipolar LFO) a pulse burst generator (Finite repeated functions that ascend or descend in amplitude) a morphing, bipolar beat syncable LFO The envelopes all feature a continuously variable response curve, ranging from logarithmic through linear to exponential, and each stage can be as snappy as 0.05 ms to as lengthy as 20 seconds. Adjusting the curve time will not affect your overall envelope length. Each of the main modes have an alternate—the envelopes allow you to mirror the rising curve shape on the fall stage. When set to Burst mode, the channel generates a rising or falling burst of pulses, with full control over the length of the pulse burst, the number and shape of the bursts within it, and whether the bursts increase or decrease in amplitude over the burst. When in alternate mode, the shape of the bursts changes from a square/sine combo into a tilting saw that matches your amplitude shape. AD, AHR, Cycling and Burst modes all feature a user-selectable maximum output level of either 10V or 5V. LFO mode offers control over the frequency and waveshape, while providing a unique morphing feature that creates numerous variations of the selected waveshape. LFOs can be either free-running or beat-synchronized using the channel’s TRIG input. When set to alternate mode, it becomes a LFV (Low Frequency Vacillator) integrating the same syncing features of the LFO into a random voltage source that rises and falls on its own whims, you control the range of it’s changes and filter/slew its output with the panel controls. Channels can be chained together to create complex multi-stage envelopes, with each channel triggered by the previous channel’s trigger input, end-of-rise, or end-of-fall. This enables multiple function generators to fire simultaneously, or it enables the creation of complex multi-stage envelopes by allowing the linked function to fire either at the end of the previous function’s rise time, or at the end of its fall time. Four freely-assignable, step-attenuverted CV inputs are capable of modulating any or all of the various parameters across all four channels using the built-in CV matrix, and built-in attenuversion for each assignment. Quadrax remembers its current state (Mode and CV assignments, channel links, etc) and retains that state even if power is removed, meaning Quadrax will always turn on in exactly the same state as you last left it.
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