28 | The Envelope Generator (EG)
The Envelope Generator (EG)
The four stages of an Envelope Generator—Attack, Decay, Sustain, and Release—combine to
create one continuous control voltage that changes over time. By default, the EG modulates
the VCA, articulating the amplitude of your sound every time a key is pressed.
Via the patchbay, this control voltage can also be used as a modulation source to control
other parameters. For example, modulating the VCF Cuto frequency to articulate the filter
or modulating the PWM amount to add timbral motion. The EG begins its cycle every time a
key is pressed (or when an appropriate voltage is received at the GATE jack). Three of the EG
parameters are defined in terms of time. Only one—Sustain—relates to level.
NOTE: This diagram shows how all four stages of the EG work together.
amplitude
attack
decay
sustain
release
time
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