Roland EV-5 Expression Pedal
The EV-5 Expression Pedals can be used to control a range of functions and effects parameters in real time. The EV-5 is an ultra-compact model that fits perfectly onto guitar pedal boards or under synthesizer setups, while the EV-7  is a larger metal version that's designed for use with combo organs like the Roland VK-Series. Both models offer a minimum volume knob.