I have two of these chainable modules available and will sell the pair for $275. You can never have too many VCAs but I am paring down my system and don’t really utilize the linear/exponential control to its potential. The Antumbra-designed DVCA is a dual VCA based on the Mutable Instruments Veils. It features two separate voltage controlled amplifiers, both with a gain and a response curve potentiometer, that is variable from linear to exponential. The outputs are normaled, so when no patch cable is present on output 1, output 2 will contain both signals, allowing the module to be used as a mixer. Included is a jumper cable for daisy-chaining multiple DVCAs for voltage controlled mixer operation.