SYSTEM-500 530

The 530 Dual VCA (voltage controlled Amplifier) features two independent voltage controlled amplifiers for controlling the loudness of audio signals. Each VCA has three sliders for an audio input mixer, three sliders to mix CV inputs, and a selector switch for linear or exponential response modes. Controllers:SIGNAL IN 1 sliderSIGNAL IN 2 sliderSIGNAL IN 3 sliderMODULATION IN 1 sliderMODULATION IN 2 sliderMODULATION IN 3 sliderLINER/EXPONENTIAL switchINITIAL knob Indicator:LOAD IndicatorOVERLOAD Indicator Connectors:SIGNAL IN 1 jack: Miniature phone typeSIGNAL IN 2 jack: Miniature phone typeSIGNAL IN 3 jack: Miniature phone typeOUT jack: Miniature phone typeSUM jack: Miniature phone typeMODULATION IN 1 jack: Miniature phone typeMODULATION IN 2 jack: Miniature phone typeMODULATION IN 3 jack: Miniature phone type http://www.rolandus.com/products/system-500_530/