Doepfer A-132-1 Dual Linear VCA Eurorack Module

Module A-132-1 (Dual Low Cost VCA) contains two voltage controlled amplifiers, with a linear response most suited to regulating the level of control voltages (ADSR amount, level of vibrato effect, etc.).
In non-critical situations, though, its VCAs can be used to control audio signals.
Amplification is governed by the sum of the voltages patched into the two CV inputs.