DOEPFER A-131 EXPONENTIAL VCA

Modules A-130 and A-131 provide voltage-controlled amplification. For audio signals, you would normally use the exponential VCA (A-131), and for control voltages, the linear VCA (A-130). It doesn't always have to be that way, though.The amount of amplification the VCAs provide is determined by the voltage at the CV input, and the position of the gain control, which sets the overall gain in the system.The VCA has two audio inputs, each with an attenuator. They are amplified by an amount determined by the combination of the gain and the two CV controls. For more detailed information please look at the English user's manual A1301_man.pdf Remarks:Over the years three different versions of the module A-130 und A-131 have been manufactured:Version 1:The first versions of A-130 and A-131 were equipped with the Curtis chips CEM3381/PA381 (A-130) and CEM3382 (A-131). These versions of A-130/131 were not able to process slowly varying control voltages as they had AC coupled signal in/o