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Front Panel

Corgasmatron Manual v1.0

Page 2 of 10

1- FREQ

 - Cutoff frequency of 

the filter. This sets the center 
frequency of the filter. 

2

- Xfader section. 

XFADE

 

position knob, CV polarity 
switch and Xfade direction 
switch. The Xfade knob acts 
as cross fader in Parallel 
configuration and using MIX 
out if nothing is plugged into 
the Xfade jack. Once patched 
the Xfade knob becomes a 
CV attenuator.

3- Q

 is also referred to as 

resonance. Depending on 
input gain moving this knob 
past 1 o

ʼ

clock will cause the 

filter to start oscillating.  

4- Q-DRIVE

 - is the level of 

the resonance. This control is 
also used to alter the timbre 
of the resonant sound if the 
filter is self oscillating.

5- FM1 -

 Unipolar attenuator 

for FM1 input. 

6- IN A

 - Input attenuator controls the level into the filter. For classic tone keep this below 12 

o

ʼ

clock. 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!
 

7- FM2

 - Bi-polar attenuator for FM2 input. This is a center detent knob. Turning the knob 

CCW will apply inverted CV, turning the knob CW will apply positive CV.

8

- Filter mode switch. The three modes are 1 pole High Pass, 1 pole Notch, 2 pole Low Pass

9

- Input and output jacks. Outputs are surrounded by a black outline.

Содержание Corgasmatron

Страница 1: ...es 16HP and shallow two pcbs in parallel so it is skiff friendly two independent filters each with LP HP and Notch modes Unique resonant Q drive control A Switch links the two filters allowing both parallel and serial routing via normals to input B which can be broken by inserting a cable at input B Oscillates very easily and can be used as a dual sine VCO Using the resonance controls this Sine sh...

Страница 2: ...nce This control is also used to alter the timbre of the resonant sound if the filter is self oscillating 5 FM1 Unipolar attenuator for FM1 input 6 IN A Input attenuator controls the level into the filter 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 f...

Страница 3: ...er A Patch a audio signal here to be filtered The knob IN A attenuates this signal The input signal level alters the tone of the filter circuit and the resonance behavior For classic filter tone set the IN A knob to 11 oʼclock when using standard level modular VCOs 1V Oct A CV input for filter frequency calibrated for 1V oct standard By patching the 1V Oct output of your keyboard or MIDI to CV con...

Страница 4: ...1 Khz set routing configuration to parallel and monitor out the MIX out Turn the Xfade front panel knob fully CW so as to only pass filter B Now adjust the trimmer slowly until the filter A is no longer heard This is calibrated at the factory 2 jumper Q behavior selection filter B This jumper selects different diodes for the Q circuit 1 2 is Modern mode 2 3 is Vintage mode ...

Страница 5: ... VCA inserted between the pins labeled Q will enable VC control over Q 5 1V oct Adjustment of filter A and B Although these are calibrated at the factory vibrations during shipping variance between power supply voltages and component tolerances changing over time can cause the filter to move out of tune Use this trimmers to calibrate the 1V oct response of the filter if you need to See page 6 for ...

Страница 6: ...requency meter into Out A or use headphones speakers to listen to the output if tuning by ear 4 Make note of your base frequency and then using your CV source increase it by one octave If the new octave is sharp relative to the base note then adjust the trim pot to make the note sharper note this may be counterintuitive If the new octave is flat relative to the base note then adjust the trim pot t...

Страница 7: ...Corgasmatron block diagram Corgasmatron Manual v1 0 Page 7 of 10 ...

Страница 8: ...A Audio output comes from MIX Patch according to the chart above to create the classic VCO VCF VCA voice Tips Patching a CV controller such as a joystick into FM2 A and setting both FM2 knobs to the same setting will enable you to control both filter cutoffs simultaneously Use FM1 inputs for both filters for different modulation such as velocity to VCF B Use the Q on VCF A to give a bass boost Adj...

Страница 9: ...Specifications Width 16 HP Depth 35mm Current Draw 12v 70ma 12v 67ma Expected input 5v peak to peak OTA component Cool Audio SSM2164 Credits Original Corgasmatron design David Dixon Eurorack conversion PCB design and realization Danjel van Tjin Manual written by Haven Siguenza Danjel van Tjin David Dixon Copyright 2011 Intellijel Designs Inc Corgasmatron Manual v1 0 Page 9 of 10 ...

Страница 10: ...Made in Canada Corgasmatron Manual v1 0 Page 10 of 10 ...

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