Doepfer A-100(~ 40 MB) - Manual (Page 341)

doepfer System A - 100 VCA A-130 / A-131
1
1. Introduction
Modules A-130 (Linear VCA) and A-131 (Exp. VCA)
provide voltage-controlled amplification.
H This section of the manual applies equally to
the A-130 and A-131, because apart from
the one difference of their response curves,
they are otherwise identical.
For audio signals, you would normally use the expo-
nential VCA (A-131), and for control voltages, the
linear VCA (A-130). It doesn’t always have to be that
way, though.
The amount of amplification the VCAs provide is de-
termined by the voltage at the CV input, and the
position of the gain control, which sets the overall gain
in the system.
The VCA has two audio inputs, each with an at-
tenuator. They are amplified by an amount determined
by the combination of the gain and the two CV con-
trols.
CV 1
Audio
In 1
CV 2
Audio
In 2
In 2
CV 2
Gain
A-130
VCA-LIN.
In 1
Audio Out
Out