21 | The Voltage Controlled Oscillator (VCO)
OSCILLATOR PARAMETERS
PITCH
The PITCH knob sets the initial frequency of the Oscillator, thereby setting
the pitch. Rotating the knob counterclockwise lowers the Pitch, while rotating
the knob clockwise raises the Pitch. While holding down the lowest C on the
keyboard, the value can be set from 8 Hz (fully counterclockwise) to 8 kHz
(fully clockwise).
NOTE: We think of human hearing as being roughly between 20 Hz–20 kHz, so 8 Hz
is pretty darn low, and may not be audible as more than a series of clicks.
The Voltage Controlled Oscillator (VCO)
Sound begins with an object moving back and forth; this could be a guitar string, a clarinet
reed, the vocal cords, or—in the case of a synthesizer—an Oscillator. Mavis uses a single
Voltage Controlled Oscillator (VCO) to generate sound. The top row of knobs control
Oscillator parameters related to pitch and timbre; the second row of knobs are used to
apply modulation to those Oscillator parameters.
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