Euterpe Synthesizer Laboratories Vertice, Руководство пользователя

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THE COMPONENTS [ 41 ]
the Envelope Generator section
This Envelope Generator is a totally analog op-amp design, made without digital timers or counter, customized
for very fast and very low performances. It is not the common EG structure even as it migh seem so. We chose
to implement and use this design knowing its differences between it and a "normal" EG. But VERTICE and
"normality" are two separated things, so...
Our EG is comprised of:
• the classic ADSR envelope controls, which allow to shape the output CV in both time and level axes
• a Level attenuator, which gives huge control possibilities when modulating filters, VCA or external devices
(via dedicated rear port)
• the Percussive/Smooth/Slow switch, changing the "time range" of the EG, both in triggered or looping mode
• the Inverted switch, to obtain an increasing positive response or a decreasing (positive) one
• the Loop activator, which can produce from very slow to audio-range modulations (max circa 170Hz)
• the VCF/VCA selector, to route the CV between the two main modules
• the anti-vandal high-end super-professional Trigger button, to have the pleasure of pushing something
hard and smooth at the same time (10000 cycles min) :)
• the fashionable old-style LED, to let you and your hardwood cigarette mouthpiece always contextualized
• the REAR dedicated buffered OUTPUT
• the Gate input port, very useful to control and sync VERTICE via audio, CV signals and Gate signals
This chapter will focus a bit more on these elements, trying to give a starting-point, and tips and tricks to help
apply the main modulation source of Vertice to best effect.
Here is the classic representation of an ADSR algorithm and the related GATE signal injected to get it work.
This is a time-related graph. Time flow from left to right.
A squared CV input and pushing the Trigger button generates the same effect.
Sustain level
10 v
0 v
0 v
about 5 v
key pressed key released
key holded
At
ta
c
k
Deca
y
Release
ENVELOPE
GENERATOR
OUTPUT
ENVELOPE
GENERATOR
INPUT (GATE)