VCA (Voltage Controlled Amplifier)The A-131 module is a voltage-controlled amplifier. An exponential VCA (A-131) is usually used for audio applications, while a linear VCA (A-130) is used for control applications. However, this is not a compulsory requirement.
The gain of the VCA determines the control voltages at the CV inputs and the position of the gain controller, which is used to adjust the basic gain of the VCA. Each VCA has two audio inputs with pre-attenuated attenuators whose sum mix is ââamplified according to the control voltages and the position of the gain control.
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