Getting Started
PS-20 Primer
Top Toolbar, Preset, and Focus Control
VCO 1 and 2
Mixer
Highpass and Lowpass Filter
Modulation Generator
VCA
Envelope Generator 1 and 2
Voice Assigner and Pitch Settings
Output Section
Patch Panel Cables
Using The Patch Panel
Patch Panel Extras
External Signal Processor
Sequencer
Effects
MIDI Controllers Setup and The MIDI Tab
Using MPE
QWERTY Musical Typing Keyboard (MTK)
Settings
Outside of a modulation attenuator, PS-20's main VCA doesn't any controls, per se, but it's helpful to understand its functionality.
VCA is an acronym for "voltage-controlled amplifier," which is a fancypants way of saying, "volume knob, controlled by voltage." The sideways triangle on the panel is the standard schematic symbol for an amplifier. The horizontal lines on either side indicate the signal flowing through it, and the EG 2 & Ext labels with upward arrow show the incoming voltage controlling the amount of signal flowing through. A simple analogy would be to think of the horizontal line as water flowing from left to right, and the control voltage from the bottom as a faucet that gets adjusted by the incoming control voltage.
The VCA is hardwired for control via EG 2, but it can also be controlled with EG 1 using its output in the patch panel, patched to the VCA Amount jack.
VCA Modulation Attenuator Control
Mod Gen/Patch Panel- Sets the amount of modulation signal routed to the VCA either via the hardwired internal MG saw/triangle/ramp wave or from the patch panel VCA Mod input jack when a source is plugged into it.