The MFB VCA offers three signal inputs and two outputs - one of each has an attenuator. The module has one special feature: the CV1's intensity can be modulated by CV2.
MFB-VCA offers three inputs, of which input 1 can be continuously attenuated. Inputs 2 and 3 offer no attenuators but different sensitivities. They are intended as alternatives for different signal sources rather than to be mixed.
Both CV-inputs can be adjusted in amplification. An envelope generator will typically control CV-1. A distinctive feature for CV-input 2 is its dependency to CV-input 1. Only if voltage is applied to CV-1, any CV-2 control becomes active. A typical application would be a dynamic tremolo effect: With CV-1 under envelope control and CV-2 under LFO control, the tremolo will only be audible with a note held.
There are two parallel outputs: Output 1 has fixed level and output 2 offers variable attenuation.