Quad VCA is a 4-channel, advanced voltage controlled amplifier with an analog signal path that can either be used stand-alone, or in tandem with the Varigate 4+ and 8+ for multiple preset recall over the power bus. Input channels 2-4 are normalled to 1 and Scan Mode allows for complex level and modulation routing. Each channel includes a mute function and all outputs are summed to a mix output. To adjust level and CV modulation per channel, use the Select Channel buttons and then adjust the Offset and Attenuverter controls. Scan Mode includes two functions. Scan: Insert 4 inputs, 1 CV and monitor Mix output for 4:1 scanning. Pan: Insert an input into Ch 1 and Ch 1 CV will route input to up to 4 different outputs. Offset and Attenuation can be adjusted to control how incoming CV is applied. The Remote switch allows you to access saved presets when paired with Varigate 8+ (100 presets) or Varigate 4+ (16 presets). In stand-alone mode, all settings are auto-saved.