- Page 7 -
Voltage Controlled Amplifier
The voltage controlled amplifier, amplifies the input signal depending on it’s control voltage. This means a high
control voltage results in a high amplification, therefore on the VCA’s output you’ll get a high volume. Contrariwise
a low control voltage means a low amplification and therefore a low output signal.
The necessary control voltage for the VCA comes from an envelope generator.
The VCA is activated or deactivated with the VCA ON switch.
Envelope Generator
The ATTACK-DECAY envelope can modulate
the voltage controlled filter or / and the voltage
controlled amplifier.
An envelope generator generates a control voltage
which changes its value in temporal progression.
The ATTACK phase is the time which is needed to
raise the voltage from 0% to 100%.
The DECAY phase is the time which is needed to
decrease back down to 0%.
ATTACK and DECAY times can be set with the
corresponding controllers.
The envelope can be triggered from different sources:
The input signal
When the input signal reaches a special level (threshold), the envelope will be started. This sensitivity (threshold)
can be set with the TRIG SENSE controller. If this controller is set to the zero position, the envelope won’t be
triggered. The more it is raised clockwise, the more sensitive its reaction to the input signal will be.
An additional audio signal (audio trigger)
An additional audio signal can be fed in the trig jack “EG” on the rear of the Retroverb. The sensitivity of this
signal can be adjusted with its corresponding trimmer.
A Gate signal
The same trig jack can also be fed with a standard Gate signal (positive flank) as it comes from modular systems
or analog synthesizers.
To Next Page
Loading...
