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Table Of Contents
EVOC 20 PolySynth Noise Generator Parameters
The noise generator provides a further sound source that can be used alongside the two
oscillators.
Important: The noise generator in the Oscillator section is independent of the noise
generator in the U/V Detection area. For further information about voiced and unvoiced
signals, see EVOC 20 PolySynth (U/V) Detection Parameters.
Level knob: Controls the amount of noise added to the signals of the two oscillators.
Color knob: Controls the timbre of the noise signal. At the full-left position, the noise
generator creates pure white noise. At the full-right position, you hear blue noise
(high-passed noise). White noise has always been used to create wind and rain sound
effects. It has the same energy in each frequency interval. Blue noise sounds brighter,
because its bass portion is suppressed by a highpass filter.
Tip: Set Color to the full-right position and Level to a very low value to achieve a more
lively and fresh synthesis signal.
EVOC 20 PolySynth Tuning and Pitch Parameters
The parameters at the lower left of the interface are used to control the overall tuning
and other pitch-related aspects of the EVOC 20 PolySynth sound.
Analog knob: Simulates the instability of analog circuitry found in vintage vocoders by
randomly altering the pitch of each note. This behavior is much like that of polyphonic
analog synthesizers. The Analog knob controls the intensity of this random detuning.
Tune field: Defines the overall tuning of the EVOC 20 PolySynth, in cents.
Glide knob: Determines the time it takes for the pitch to slide from one note to
another—portamento. (For information about mono and legato, see EVOC 20 PolySynth
Global Parameters.)
Bend Range field: Determines the pitch bend modulation range, in semitone steps.
149Chapter 7 EVOC 20 PolySynth