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Important: Take care with the Level knob, particularly when a high Sensitivity value is
used, to avoid internally overloading the EVOC 20 TrackOscillator.
EVOC 20 TrackOscillator Synthesis In Parameters
The Synthesis In section controls various aspects of the tracking signal for the synthesizer.
The tracking signal is used to trigger the internal synthesizer.
• Synthesis In pop-up menu: Sets the tracking signal source. The choices are:
• Oscillator (Osc.): Sets the tracking oscillator as the synthesis source. The oscillator
mirrors, or tracks, the pitch of the analysis input signal. Choosing Osc activates the
other parameters in the Synthesis section. If Osc is not chosen, the FM Ratio, FM Int,
and other parameters in this section have no effect.
• Track: Uses the input audio signal of the channel strip, in which the EVOC 20
TrackOscillator is inserted, as the synthesis signal, which drives the internal synthesizer.
• Side Chain: Uses a side chain as the synthesis signal. You choose the side chain source
channel from the Side Chain pop-up menu at the top of the EVOC 20 TrackOscillator
window.
Note: If you choose Side Chain and no Side Chain channel is assigned, the EVOC 20
TrackOscillator reverts to Track mode operation.
• Bands field: Determines the number of frequency bands used by the Synthesis In section.
Basic Tracking Oscillator Parameters
The tracking oscillator follows the pitch of incoming monophonic audio signals and
mirrors these pitches with a synthesized sound. The FM tone generator for the tracking
oscillator consists of two oscillators, each of which generates a sine wave. The frequency
of Oscillator 1 (the carrier) is modulated by Oscillator 2 (the modulator), which deforms
the sine wave of Oscillator 1. This results in a waveform with rich harmonic content.
113Chapter 6 Filter Effects