This one in via Soviet Space Child.
"The C110 2044 VCF is a four pole low pass filter based in the classic filter SSM2044. This filter chip is responsible for the sound of some well known polysynths from the 80s like the Korg Mono / Poly , Korg Polysix , Korg Trident, PPG Wave 2.2 and 2.3 ,EMU Emulator I, Kawai K3, Sx-240 , Siel Opera 6 ….
The C110 is designed using the new reissued SSI2144 IC. It is an updated version of the original SSM2044 with lower noise, better control feedthrough but preserving all the sonic characteristics of the original design.
Like many filters the SSM2044 suffer from gain loss when the resonance is increased , the C110 includes an especially designed circuit co correct that. This circuit can be activated or deactivated on the front panel allowing the user to select between the traditional response and the gain compensated response.
The C110 has temperature compensated voltage control and it will oscillate at high resonances. It can be used as an oscillator over 3-4 octaves.
The C110 main characteristics are :
Four pole response ( 24db/octave )
Gain compensation circuit
Three modulation inputs one with an attenuverter
Voltage controlled resonance
Temperature compensated
One audio input
The FM2 input has a 0,66 V/Octave response expanding the modulation range to 7,5 octaves using the typical 5V envelope.
The C110 2044 VCF is built using high quality electronic components, Switchcraft jacks, Cosmo knobs (the same used by Moog Modular) , anodized aluminum front panel…."
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