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Table Of Contents
156 Chapter 14 EVOC 20 PolySynth
To switch between waveforms, do one of the following:
m Click-hold on the numerical waveform field and drag up or down.
When the desired waveform number is visible, release the mouse button.
m Double-click the numerical field and input the desired value.
Note: When in FM mode, the waveform of Wave 1 is a fixed sine wave. The waveform
parameter of Wave 1 does not have an effect in this mode.
Wave 2 Parameters
The numerical value beside the Wave 2 label indicates the currently selected waveform
type. The EVOC 20 PolySynth features 50 single-cycle digital waveforms with different
sonic characteristics.
To switch between waveforms, do one of the following:
m Click-hold on the numerical waveform field and drag up or down.
When the desired waveform number is visible, release the mouse button.
m Double-click the numerical field and input the desired value.
Noise Parameters
The noise generator provides a further sound source which can be used in addition to
the two oscillators (Wave 1 and Wave 2).
 Level knob: Controls the amount of noise added to the signals of the two oscillators.
 Color knob: Controls the timbre of the noise signal. When the Color knob is turned
fully-left, the noise generator creates a pure white noise. When turned fully-right, it
generates 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.
It is important to note that the noise generator in the Oscillator section is independent of
the noise generator in the U/V Detection section. For further information on voiced and
unvoiced signals, refer to “Unvoiced/Voiced (U/V) Detection, from page 165 onwards.
Tip: Turn Color full-right and Level a tiny bit up to achieve a more lively and fresh
synthesis signal.