Quadra & Expander Manual
Overview
The Intellijel Quadra and Expander modules comprise four parallel function generators (more
commonly referred to as “Envelope Generators,”) plus numerous CV controls. The Quadra
function generator has three modes, AD (Attack, Decay), ASR (Attack, Sustain, Release) and
Cycle (a perpetually repeating AD envelope, which acts like a unipolar LFO). Each function can
be configured to have a linear or exponential curve, and each features a wide time-base control
from 0.5ms to over 30 seconds. The Expander enhances Quadra’s core functionality by allowing
attenuated voltage control over Attack and Decay for each function generator; plus a
Quadrature mode and an analog OR mixer for each function generator pair.
This manual discusses both the Quadra and its optional Expander module.
Quadra Features
●
Four function generators with Attack and Decay times ranging from from 0.5 milliseconds
to over 30 seconds.
●
Three modes: AD (attack, decay), ASR (attack, sustain, release), Cycle (AD envelope
loops)
●
Exponential and Linear envelope curves
Additional Expander Features
● Four End of Cycle pulse outputs corresponding to the four function generators.
● Voltage control of attack and decay (with attenuators) of all four envelopes
● Two analog OR (Also known as Peak Circuit) logic outputs that are normalled to the two
pairs of envelopes with attenuators.
● Special Quadrature modes.
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