mfb 24db vcf price : $125.00

the 24db vcf (voltage controlled filter) module is a lowpass-filter that follows the famous cascade invented by moog.

the filter module has two audio inputs with input 1 offering variable attenuation. when not patched the filter output is fed back into this input. by this, it is easy to recreate the legendary feedback-trick that leads to additional pushing bass. input 2 has a fixed input sensitivity that matches the mix output of mfb's oscillator modules osc-01 and osc-02.

filter cutoff can be controlled manually as well as from cv-sources. cv-1 is adjustable in intensity and intended to be used with an envelope generator. cv 2 has two functions: it accesses the internal key-cv-voltage provided by the system-bus (when fed by a midi/cv-interface). this allows for easy key-tracking for the cutoff-frequency. tracking-intensity can be adjusted by a trim-potentiometer. an additional front-panel-input allows adding a further cv-source (e.g. lfo) that uses the same potentiometer. to use this input independently, the system-bus-access can be disabled by setting a jumper on the circuit board.

filter resonance, called emphasis in reminiscence to moog, can also be adjusted manually and by an adjustable cv-input.

the module has a width of 40 mm (8 te).

the user manual is available as a word document here.