Owner`s manual

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VOLTAGE-CONTROLLED AMPLIFIER (VCA)
The Voltage-Controlled Amplifier (VCA) is the final point in The Source's signal path. Like the filter, it responds to
a positive voltage at its control input; the response, however, is an increase not in brightness, but in loudness.
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The VCA itself is not pictured on the front panel, but its primary controller, the loudness contour generator, is.
Voltage from the loudness contour generator opens and closes the VCA. (The contour generator is explained more
fully in the Controllers section.)
Touch program 0 :
VOLTAGE CONTROLLED FILTER
KB TRACK
LOUONES8 CONTOUR
WAVESHAPE
INTERVAl
OSCILLATOR BANK
8 H 9 110111112913114115116
1. Hold down any key. The VCA opens and closes quickly. When the voltage controlled amplifier has no voltage
at its control input, it closes down, shutting off all audio signals. Review the loudness contour controls to note
the exact duration of each note.
Although the VCA is represented by only four front panel controls, in many ways it is the most important
circuit in the synthesizer. If the VCA is closed down, nothing will be heard. The first rule of synthesis is:
Open the VCA!
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