Going modular percussions with the Intellijel Corgasmatron
This is a 2-part video demonstration of the Intellijel Corgasmatron eurorack VCF, using it’s screaming resonant filters for percussive / subbass / metallic mayhem. No audio signals (VCOs / noise) are being passed through the VCF – what you hear is coming strictly via the Corgasmatron’s self-oscillating filters.
All of the sequencing is done via a Make Noise setup — Brains, 2x Pressure Points, and clocked by a MATHS.
In the first part, only the LPF is used. It’s being modulated by an MFB ADSR, and the Make Noise B+PP. The MATHS is being used as a slew/portamento occasionally.
In the 2nd part, Make Noise B+PP is also sequencing a Jomox MBase01 kick, and a Snare part created with MS-20 white noise into a YuSynth Arp VCF. The Cogasmatron’s signal path is set up just like an MS20 – HPF into LPF in series. HPF is being modulated by PP+B (FM2), + a Tip Top Audio z3000 mk2 VCO (FM1). I used the z3000’s sine wave out (I think). The z3000 is also being sequenced by the PP+b. LPF is being modulated by MFB ADSR (FM2), and PP+B (FM1).
Key features:
-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 resonant controls this Sine shape can be colored.
-1V/Oct inputs
-Built in full featured cross fader allows voltage controlled xfading between the two filters. The Xfade has a switch to select either unipolar (e.g. envelopes) or bipolar (e.g. lfo) control of the xfade position. There is also a switch to select direction. With nothing plugged into the Xfade jack the xfade knob controls the fade position. When an external CV is patched in the same knob acts as an attenuator for the control signal.
-Jumpers on the back to select “modern” or “vintage” resonant modes (two different feedback paths for the resonance that use different diodes)
-expansion jacks for adding additional filter inputs and VC control of resonance
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