User manual
pair of mid outputs
12
. Similarly, the low
band and high band are available at their
stereo pairs of low and high outputs
13
and
14
(post-VCA) is available at the sum pair of
outputs
15
.
FILTERING
Splitting the signal into separate frequency
bands is implemented with a set of special
are designed so that with no attenuation, the
sum of all three bands reconstructs the origi-
nal signal without any gaps in the spectrum.
The frequency responses of all three bands
They all offer a 24dB/octave slope beyond
Keep in mind that the mid freq controls
center of the mid band (the middle point in
-
ple, when mid freq is set to 2kHz and the
mid width is 2 octaves, the mid band spans
from 1kHz to 4kHz (measured at –6dB split
point). When CV inputs are used, manual
controls act as offsets. There is a global lim-
it of the split frequencies meaning that they
Also, the minimum width of the mid band is
1 octave.
AMPLITUDE CONTROL
Katowice offers independent amplitude
control for each of its three bands. A slider
in each band allows for attenuation of the
signal down to about –100dB. The response
of this potentiometer is carefully bent to
provide the natural feel of a fader. This at-
tenuation may also be achieved by patching
a negative CV to the corresponding jack. Con-
versely, when the slider is set near the bot-
tom, a positive CV will bring the signal back.
voltage of 8V opens it entirely to unity gain.
In order to prevent hard clipping, each VCA
channel features a soft-saturation circuit
that rounds the peaks of signals approach-
ing 18Vpp.
Katowice ships factory calibrated so that the
trimmer at the back allows for shifting the
gain range (including the limit) up to ±20dB.
Keep in mind that adjusting this will make
panel dB scale relative to what you set.
4
example frequency response
mid width
20
10
0
-10
-20
-30
-40
-50
-60
10 100 1000 10000
Hz
dB
mid freq