Intellijel KORGASMATRON II
Illustrated supplement
by Demonam
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Index |
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01... LP2 / 2-pole low-pass filter |
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37... (BP1 + HP2) filter patch |
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02... LP1 / 1-pole low-pass filter |
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38... (BP1 + HP2) filter curves |
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03... BP1 / 1-pole band-pass filter |
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39... (BR1 + LP1) filter patch |
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04... HP1 / 1-pole high-pass filter |
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40... (BR1 + LP1) filter curves |
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05... HP2 / 2-pole high-pass filter |
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41... (BR1 + LP2) filter patch |
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06... BR1 / 1-pole band-reject filter |
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42... (BR1 + LP2) filter curves |
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07... Dual 1V/Oct sine oscillator |
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43... (BR1 + HP1) filter patch |
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08... Normalled inputs |
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44... (BR1 + HP1) filter curves |
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09... |
SERIAL configuration |
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45... (BR1 + HP2) filter patch |
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10... |
PARALLEL configuration |
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46... (BR1 + HP2) filter curves |
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11... |
XFADE response - 01 |
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47... |
Heavy dub bass |
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12... |
XFADE response - 02 |
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48... Ping ! |
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13... State-variable stereo filter |
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49... |
Weird filter |
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14... State-variable stereo filter - VC pan patch |
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50... |
Spacewave sound |
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15... 1-pole BAND-PASS filter patch |
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51... |
Feedback loop |
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16... 1-pole BAND-PASS filter curves |
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52... |
Cross-FM |
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17... 2-pole BAND-PASS filter patch |
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53... |
Feedback FM loop |
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18... 2-pole BAND-PASS filter curves |
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54... |
Drone zone 1 |
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19... 1-pole BAND-REJECT filter patch |
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55... |
Expander - Overview |
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20... 1-pole BAND-REJECT filter curves |
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56... |
Expander - VC Q filtering |
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21... 2-pole BAND-REJECT filter patch |
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57... |
Expander - Quad filter |
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22... 2-pole BAND-REJECT filter curves |
58 |
... Expander - Quad filter feedback loop |
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23... Asymmetrical BAND-PASS filter patch |
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59... Expander - Cross-Q modulation |
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24... Asymmetrical BAND-PASS filter curves |
60... |
Expander - Feedback cross-Q modulation |
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25... Asymmetrical BAND-REJECT filter patch |
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61... |
Expander - Drone zone 2 |
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26... Asymmetrical BAND-REJECT filter curves |
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27... Dual BAND-PASS filter patch |
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28... Dual BAND-PASS filter curves |
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29... Dual BAND-REJECT filter patch |
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30... Dual BAND-REJECT filter curves
31... (BP1 + LP1) filter patch
32... (BP1 + LP1) filter curves
33... (BP1 + LP2) filter patch
34... (BP1 + LP2) filter curves
35... (BP1 + HP1) filter patch
36... (BP1 + HP1) filter curves
set filter cutoff frequency
set resonance self-oscillate past 1 o'clock
unipolar attenuator for
FM1 input
set level of resonance
bipolar attenuator for
FM2 input
gain unipolar attenuator for
signal A input
filter A out
LP2 / 2-pole low-pass filter
Input attenuator IN A (and/or B) controls the level into the filter A (and/or B).
For classic tone keep this below 12 oʼclock.
Higher gain will suppress the resonance of the filter and change its tone.
The combination of IN A level, Q and Q Drive knobs can alter the tone of the filter dramatically from sweet to scathing - experiment!
out
cutoff |
freq. |
increase |
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out |
Q |
freq.
cutoff
filter B out
signal(s) to be filtered
01
set filter cutoff frequency
set resonance self-oscillate past 1 o'clock
unipolar attenuator for
FM1 input
set level of resonance
bipolar attenuator for
FM2 input
gain unipolar attenuator for
signal A input
filter A out
LP1 / 1-pole low-pass filter
Input attenuator IN A (and/or B) controls the level into the filter A (and/or B).
For classic tone keep this below 12 oʼclock.
Higher gain will suppress the resonance of the filter and change its tone.
The combination of IN A level, Q and Q Drive knobs can alter the tone of the filter dramatically from sweet to scathing - experiment!
out
cutoff |
freq. |
increase |
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out |
Q |
freq.
cutoff
filter B out
signal(s) to be filtered
02
set filter cutoff frequency
set resonance self-oscillate past 1 o'clock
unipolar attenuator for
FM1 input
set level of resonance
bipolar attenuator for
FM2 input
gain unipolar attenuator for
signal A input
filter A out
BP1 / 1-pole band-pass filter
Input attenuator IN A (and/or B) controls the level into the filter A (and/or B).
For classic tone keep this below 12 oʼclock.
Higher gain will suppress the resonance of the filter and change its tone.
The combination of IN A level, Q and Q Drive knobs can alter the tone of the filter dramatically from sweet to scathing - experiment!
out
cutoff |
freq. |
increase |
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out |
Q |
freq.
cutoff
filter B out
signal(s) to be filtered
03
set filter cutoff frequency
set resonance self-oscillate past 1 o'clock
unipolar attenuator for
FM1 input
set level of resonance
bipolar attenuator for
FM2 input
gain unipolar attenuator for
signal A input
filter A out
HP1 / 1-pole high-pass filter
Input attenuator IN A (and/or B) controls the level into the filter A (and/or B).
For classic tone keep this below 12 oʼclock.
Higher gain will suppress the resonance of the filter and change its tone.
The combination of IN A level, Q and Q Drive knobs can alter the tone of the filter dramatically from sweet to scathing - experiment!
out
cutoff |
freq. |
increase |
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out |
Q |
freq.
cutoff
filter B out
signal(s) to be filtered
04
set filter cutoff frequency
set resonance self-oscillate past 1 o'clock
unipolar attenuator for
FM1 input
set level of resonance
bipolar attenuator for
FM2 input
gain unipolar attenuator for
signal A input
filter A out
HP2 / 2-pole high-pass filter
Input attenuator IN A (and/or B) controls the level into the filter A (and/or B).
For classic tone keep this below 12 oʼclock.
Higher gain will suppress the resonance of the filter and change its tone.
The combination of IN A level, Q and Q Drive knobs can alter the tone of the filter dramatically from sweet to scathing - experiment!
out
cutoff |
freq. |
increase |
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out |
Q |
freq.
cutoff
filter B out
signal(s) to be filtered
05
set filter cutoff frequency
set resonance self-oscillate past 1 o'clock
unipolar attenuator for
FM1 input
set level of resonance
bipolar attenuator for
FM2 input
gain unipolar attenuator for
signal A input
filter A out
BR1 / 1-pole band-reject filter
Input attenuator IN A (and/or B) controls the level into the filter A (and/or B).
For classic tone keep this below 12 oʼclock.
Higher gain will suppress the resonance of the filter and change its tone.
The combination of IN A level, Q and Q Drive knobs can alter the tone of the filter dramatically from sweet to scathing - experiment!
out
cutoff |
freq. |
increase |
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out |
Q |
freq.
cutoff
filter B out
signal(s) to be filtered
06
filter A coarse frequency set
make filter A self-oscillate
filter A kind of fine frequency set
filter A sine out
1V/Oct quantized CV
Dual 1V/Oct sine oscillator
filter B coarse frequency set
make filter B self-oscillate
filter B kind of fine frequency set
filter B sine out
sine A and B mix out in PARALLEL configuration
07
Normalled inputs
FILTER A :
IN A : Signal input to filter A. Patch a audio signal here to be filtered. The knob IN A attenuates this signal. This is normalled to the IN B input of filter B.
FM2 A : CV input to VCF A filter cutoff, attenuated with inversion by FM2 A knob. Normalled to VCF B FM2.
1V/Oct A : CV input for filter frequency calibrated for 1V/oct standard. This is normalled to the 1V/Oct CV input of filter B.
FILTER B :
IN B : Signal input to filter B. Patch a audio signal here to be filtered. The knob IN B attenuates this signal. This is switching jack, inserting a plug here will break the normal from IN A.
FM2 B : CV input to VCF B filter cutoff, attenuated with inversion by FM2 B knob. This is a switching jack, inserting a plug here will break the normal from FM2 A.
1V/Oct B : CV input for filter frequency calibrated for 1V/oct standard. This is switching jack, inserting a plug
here will break the normal from 1V/Oct A.
FM 2 CV
Advice : If you are using the Korgasmatron II in SERIAL configuration inserting a plug into IN B jack will break the internal routing from filter A which may cause confusion.
1V/Oct quantized CV
signal to be filtered
08
XFADE position
attenuator for XFADE input
XFADE signal input
filter A out
signal to be filtered
SERIAL configuration
Advice : If you are using the Korgasmatron II in SERIAL configuration inserting a plug into IN B jack will break the internal routing from filter A which may cause confusion.
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signal to be filtered |
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filter A |
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OUT |
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XFADE |
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IN |
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filter B |
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OUT B |
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SERIAL A>B out |
XFADE SERIAL A>B
MIX out
09
XFADE position
attenuator for XFADE input
XFADE signal input
filter A out
signal(s) to be filtered
PARALLEL configuration
Use MIX output if the Korgasmatron II is in PARALLEL configuration and you want to mix the filters together to one output.
signal(s) to be filtered
filter A |
filter B |
OUT |
OUT |
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XFADE |
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MIX out |
filter B out
XFADE PARALLEL A/B
MIX out
10
XFADE response - 01
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UNIPOLAR signal input |
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BIPOLAR signal input |
MANUAL set (no input) |
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[0V/+...V] ADSR illustration |
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[-...V/+...V ] triangle LFO illustration |
[CCW/CW] knob illustration |
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+...V |
B |
+...V |
B |
CW |
B |
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0V |
1:1 |
0V |
1:1 |
noon |
1:1 |
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-...V |
A |
-...V |
A |
CCW |
A |
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+...V |
B |
+...V |
B |
CW |
A |
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0V |
1:1 |
0V |
1:1 |
noon |
1:1 |
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-...V |
A |
-...V |
A |
CCW |
B |
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+...V |
B |
+...V |
B |
CW |
B |
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0V |
1:1 |
0V |
1:1 |
noon |
1:1 |
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-...V |
A |
-...V |
A |
CCW |
A |
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+...V |
B |
+...V |
B |
CW |
A |
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0V |
1:1 |
0V |
1:1 |
noon |
1:1 |
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-...V |
A |
-...V |
A |
CCW |
B |
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11
XFADE response - 02
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UNIPOLAR signal input |
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BIPOLAR signal input |
MANUAL set (no input) |
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[0V/+...V] ADSR illustration |
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[-...V/+...V ] triangle LFO illustration |
[CCW/CW] knob illustration |
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+...V |
B |
+...V |
B |
CW |
B |
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0V |
1:1 |
0V |
1:1 |
noon |
1:1 |
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-...V |
A |
-...V |
A |
CCW |
A |
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+...V |
B |
+...V |
B |
CW |
A |
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0V |
1:1 |
0V |
1:1 |
noon |
1:1 |
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-...V |
A |
-...V |
A |
CCW |
B |
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+...V |
B |
+...V |
B |
CW |
B |
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0V |
1:1 |
0V |
1:1 |
noon |
1:1 |
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-...V |
A |
-...V |
A |
CCW |
A |
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+...V |
B |
+...V |
B |
CW |
A |
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0V |
1:1 |
0V |
1:1 |
noon |
1:1 |
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-...V |
A |
-...V |
A |
CCW |
B |
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12
State-variable stereo filter
Set the Korgasmatron in PARALLEL configuration.
Use same LP-BP-HP-BR's switch position for A & B filters to set type of stereo filter.
2-pole low-pass stereo filter for this illustration.
set stereo filter |
set stereo filter |
type |
type |
same position |
same position |
as filter B |
as filter B |
filter A |
filter B |
LEFT out |
RIGHT out |
LEFT signal |
RIGHT signal |
IN |
IN |
13
set stereo filter type
same position as filter B
LEFT signal
IN
RIGHT signal
IN
State-variable stereo filter - VC pan patch
Requires 2 bipolar VCAs.
Set gain of VCA to +1 and VCA 2 to -1.
In this patch, a positive offset patched at VCA 1 CV in & VCA 2 CV in down the amplitude of RIGHT out, while up amplitude of LEFT out.
A negative offset patched at VCA 1 CV in & VCA 2 CV in up the amplitude of RIGHT out, while down amplitude of LEFT out.
Use same LP-BP-HP-BR's switch position for A & B filters to set type of stereo filter.
Low-pass stereo filter for this illustration.
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set stereo filter |
same CV |
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type |
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signal |
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same position |
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as filter B |
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CV in |
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filter A |
bipolar VCA 1 |
LEFT |
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in / gain +1 |
out |
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out |
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filter B |
bipolar VCA 2 |
RIGHT |
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in / gain -1 |
out |
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out |
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CV in
14
CUTOFF/BANDWIDTH set with
A low-pass always > B high-pass
CV
CUTOFF/BANDWIDTH
CV
CUTOFF/BANDWIDTH
signal to be filtered
1-pole BAND-PASS filter patch
Monitoring band-pass filter at OUT B in SERIAL configuration.
band-pass CUTOFF shift :
Manually set A & B cutoff, with A low-pass cutoff always > B high-pass cutoff. Keep same relative knobs position for cutoff shift.
OR/AND
Input same CV signal in A & B FM 1 with same attenuation levels.
OR/AND
Use FM 2 normalled input and set FM 2 B as FM 2 A.
band-pass BANDWIDTH set :
Manually set A & B cutoff, with A low-pass cutoff always > B high-pass cutoff. Keep different relative knobs positions for bandwidth set.
OR/AND
Input different CV signals in A & B FM 1 with different attenuation level.
OR/AND
Use FM 2 normalled input and set FM 2 B as inverted of FM 2 A.
See band-pass filter chart for details on OUT B filter curves.
out
A B
freq.
band-pass filter out
15
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1-pole BAND-PASS filter curves |
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MIX |
B - HIGH-PASS 1-pole FILTER cutoff |
HP1 MODE |
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SERIAL - B OUT |
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out |
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out |
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out |
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A |
B |
A |
B |
A |
B |
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cutoff |
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FILTER |
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freq. |
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freq. |
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freq. |
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out |
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out |
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out |
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1-pole |
A |
B |
A |
B |
A |
B |
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PASS |
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freq. |
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freq. |
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freq. |
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LOW- |
out |
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out |
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out |
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A |
B |
A |
B |
A |
B |
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A - |
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freq. |
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freq. |
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freq. |
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MODELP1 |
filter BANDWIDTH |
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filter CUTOFF SHIFT |
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CUTOFF/BANDWIDTH set with
A low-pass always > B high-pass
CV
CUTOFF/BANDWIDTH
CV
CUTOFF/BANDWIDTH
signal to be filtered
2-pole BAND-PASS filter patch
Monitoring band-pass filter at OUT B in SERIAL configuration.
band-pass CUTOFF shift :
Manually set A & B cutoff, with A low-pass cutoff always > B high-pass cutoff. Keep same relative knobs position for cutoff shift.
OR/AND
Input same CV signal in A & B FM 1 with same attenuation levels.
OR/AND
Use FM 2 normalled input and set FM 2 B as FM 2 A.
band-pass BANDWIDTH set :
Manually set A & B cutoff, with A low-pass cutoff always > B high-pass cutoff. Keep different relative knobs positions for bandwidth set.
OR/AND
Input different CV signals in A & B FM 1 with different attenuation level.
OR/AND
Use FM 2 normalled input and set FM 2 B as inverted of FM 2 A.
See band-pass filter chart for details on OUT B filter curves.
out
A B
freq.
band-pass filter out
17
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