TetraVCA is a Quad Voltage Controlled Amplifier with an adjustable response curve from linear to exponential. The Control Voltage inputs all have an indvidual level control, a LED indicator and you can choose between attenuation or attenuvertion of the CV signal by flipping a switch. This allows you to amplitude modulate your signal in a more flexible way! Each channels CV’s are normalled to the next as are the outputs. That lets you create submixes.