Manual

A-130 / A-131 VCA System A - 100 doepfer

H Note that if a control voltage is partially nega-

tive (for instance an LFO modulating the VCA)

you need to set the VCA gain above zero,

since otherwise the input signal is only ampli-

fied when the modulation CV is positive (see

Fig. 3).

Fig. 3: VCA output level at different gain settings.

2 CV 2

This attenuator affects the level of voltage control at

socket ". It controls the amount of effect the CV has

on amplification.

3 IN 1 • 4 IN 2

Attenuators 3 and 4 control the level of the signals

input into the VCA.

H If the output signal distorts in an unwanted

way, turn down the input level, using control

3 and/or 4.

5 Out

This attenuator controls the total volume of the VCA’s

output.

Input

Output

Gain > 0

Gain = 0