Doepfer A-121 12dB Multimode VCF - Manual (Page 5)

doepfer System A - 100 VCF 2 A-121
5
4. Controls
1 Audio Level
This attenuator controls the input level of the signal to
be filtered, entering the module at input ! .
H If the filter’s output signal is distorted, turn
this control down, unless the distortion is
wanted as a special effect.
2 Freq.
The filter frequency is adjusted with this control.
3 FCV 2
If you want to control or modulate the cut-off frequency
by a voltage patched into input §, use attenuator 3
FCV 2 to set the level of voltage control.
4 Res.
With this control you adjust the resonance of the filter,
which emphasises the frequencies around the cut-off
frequency f
C
.
Close to the maximum position, the filter goes into
self-oscillation. In this mode it behaves like a sine
wave oscillator, and can be used as an alternative
sound source.
5 QCV 2
Attenuator 5 lets you control the level of voltage
control signal modulating the resonance (Q).