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In the synthesizer world, the
primary role of an oscillator is
to generate sound. Oscillators
can be assigned a wave shape
to determine the initial timbre
of the sound, oscillators
can be tuned to specific
frequencies, and an oscillator
can be played — its pitch
varied by a control voltage
source such as a keyboard
or sequencer.
Each voltage controlled
oscillator (VCO 1 and
VCO 2) is equipped with two
subharmonic oscillators.
These subharmonic oscillators
can be independently set to a
specific note, or subharmonic,
of the undertone series.
OSCILLATOR 1 PARAMETERS
VCO 1 FREQ
Rotating this knob will set the initial frequency, or pitch, of VCO 1. The range
of this knob is four octaves. Rotating the VCO 1 FREQ knob fully counter-
clockwise will specify the initial pitch as Middle C (262 Hz) on a piano. Rotating
this knob fully clockwise will specify the initial pitch as the highest C (4186 Hz)
on a piano.
NOTE: Engaging the QUANTIZE settings will limit the available values for the VCO 1
FREQ knob to the specific scale steps set by the current value of the QUANTIZE button.
SUB 1 FREQ (VCO 1)
The pitch or frequency of SUB 1 (the first subharmonic oscillator of VCO 1) is
derived from the initial frequency (ƒ) of VCO 1. The SUB 1 frequency is equal to
the initial pitch of VCO 1, divided by a whole number integer value from 1 to 16.
As you rotate the SUB 1 FREQ knob, you are actually selecting the integer value
used. You can hear the pitch of SUB 1 change in stepped values, starting with 1
[unison tuning to VCO 1: (ƒ)/1 = (ƒ)] when this knob is rotated fully clockwise,
and proceeding in steps to a value of 16 as this knob is rotated counter-
clockwise. Each one of these values produces a note on the undertone scale
derived from the initial pitch of VCO 1.
PANEL CONTROLS & FUNCTIONS
THE OSCILLATORS
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