The rotary effect was one of the earliest modulation effects to hit the music scene. Originally designed for Hammond* organs, the Leslie* was a rotating speaker that created the recognizable Doppler effect (think church organ). You’ve heard rotary effects on everything from It’s Only Love by the Beatles to Cold Shot by Stevie Ray Vaughan and from City Love by John Mayer to Black Hole Sun by Soundgarden. It’s everywhere! The JHS Pedals 3 Series Rotary Chorus brings you this classic, spinning chorus tone in an affordable, easy-to-use pedal format! Intensity determines the modulation depth. Speed lets you control how fast the simulated speaker “spins.” When you turn the Room toggle on (up position), it adds a roomy, reverb ambiance to the sound, much like the ambient “room microphone” sound that happens when recording a real Leslie*. CONTROLS VOLUME - Controls the overall volume of the pedal. Left is less, right is more.