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Chapter 14 The EVOC 20 PS 181
Envelope
The EVOC 20 PS features an Attack/Release envelope generator used for level control of
the Oscillator section.
• The Attack parameter determines the amount of time that it takes for the Oscillators
of the Synthesis section to reach their maximum level.
• The Release parameter determines the amount of time that it takes for the Oscillators
of the Synthesis section to reach their minimum level.
Sidechain Analysis In Parameters
Attack
The Attack parameter determines how quickly each envelope follower (coupled to each
Analysis filter band) reacts to rising signals. Longer Attack times result in a slower
tracking response to transients of the Analysis input signal.
Note: A long Attack time on percussive input signals (a spoken word or hi-hat part, for
example) will translate into a less articulate vocoder effect. Set Attack to the lowest
possible value to enhance articulation.
Release
The Release parameter determines how quickly each envelope follower (coupled to each
Analysis filter band) reacts to falling signals. Longer Release times cause the Analysis
input signal transients to sustain longer at the vocoder’s output.
Note: A long Release time on percussive input signals (a spoken word or hi-hat part, for
example) will translate into a less articulate vocoder effect. Note that Release times that
are too short result in rough, grainy vocoder sounds. Release values of around 8 to
10 ms have proven to be useful starting points.