Studio Electronics SE-3X, User Manual

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7f
ENVELOPE GENERATORS
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S hapers up & Fly
Right
FILTER ENV SERMON: The Filter envelope
shapes the timbre and overtone content
of the audio signal as it
fl ows from the
circuitry of the mixer. This envelope or
contour generator is used to dynamically
move the cuto
ff frequency. It works as
such: Each time a note or noise is
triggered, an envelope or contour
generator attached to the Filter’s cuto
ff
frequency is actuated, and sending a
control signal to the
fi lter; the control
signal rises at one rate: attack, falls at a
second rate: decay, levels out to a certain
point: sustain, a steady control voltage as
long as the gate or note is maintained,
fi nally falling o ff and vanishing at a third
rate: release, upon surrender of gate, or
fi ngers generally (though noses have
been employed when digits “run dry”).
ATTACK (VCF)
Sets the F ILTER Attack time. The ATTACK
time determines the initial segment of
the envelope. The frequency at which the initial contour begins is determined by the FREQUENCY ( fi lter) setting, while
the peak which it reaches is determined by the FREQUENCY and ENV1 AMNT amount settings combined.
Incrementing the ATTACK knob with a healthy ENV1 AMNT amount, from 1 m-sec to approximately 10 seconds, will
result in the brightness of the sound increasing sharply and dramatically at 1st, and then more gradually as the ATTACK
time lengthens.
DECAY (VCF)
Sets the F ILTER DECAY time. DECAY time determines the duration of the second segment of the envelope, i.e., the fall
from the ATTACK peak to the SUSTAIN level. When repeatedly triggering a note/noise and increasing the value with a
robust ENV1 AMNT amount from 1 m-sec to approximately 20 sec., you will at 1st hear the brightness drop sharply
after the initial ATTACK . This drop will become more gradual as the DECAY time lengthens.
SUSTAIN (VCF)
Sets the F ILTER SUSTAIN level. SUSTAIN level determines the fi lter frequency at which the envelope holds after the
initial rise and fall. The frequency of the SUSTAIN level can be as high as the initial peak, which would override the
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