CORSYNTH
C110 2044 VCF
3
HTTP://WWW.CORSYNTH.COM
CONTROL DESCRIPTION
FREQUENCY
This control sets the cutoff frequency of the filter. The frequencies
above cutoff frequency are attenuated at a rate of 24dB per
octave. When the control is set to 10 position the filter is totally
open so it doesn’t have effect over the audio frequency.
RESONANCE
This control sets the resonance level. Above 9 position the filter
will self-oscillate with a frequency defined by the frequency con-
trol. The generated waveform is a very pure sine wave that can be
used as sound source.
RESONANCE COMPENSATION SWITCH
The original 2044 filter as many other filters suffer from gain loss
when the resonance is turned up. This switch activated an especia-
lly designed circuit to compensate this gain loss. In
NORM
posi-
tion the filter has no compensation and in the
COMP
position the
volume loss is compensated.
FM2
Frequency modulation input. This input has 0.66V / Octave
response getting this way a 7,5 octaves modulation range using a
5V envelope. The
FM 2 LEVEL
potentiometer sets the amount of
modulation. This potentiometter is a reversible attenuator, in
center position there is no modulation , to the right attenuates the
input signal and to the left attenuates an inverts the input signal.
The input allow positive and negative signals which together with
the value set by the
FREQUENCY
control, the
FM1
and the
1V / OCT
inputs sets the final value of the cutoff frequency.