Mode I follows the standard setting of a Leslie 122 and suits guitar, bass and keyboards. Mode II widens that voice for use after overdrive and distortion. Mode III adds a stronger sense of rotation, deeper drive and a firmer attack.

Separate Slow and Fast knobs set the two rotor speeds, and the pedal ramps between them. A two-position Rise/Fall Time switch sets how quickly the rotors speed up and slow down. The same switch sets how long the brake takes to stop them. Drive adds tube-style saturation, and a rear switch turns that knob into a treble and bass rotor balance.

In the factory setting, a tap turns the effect on and off and a long press toggles slow and fast. Three other switch types let a tap change speed, or hold fast or slow only while pressed. A footswitch can change speed and apply a brake that stops the virtual rotors. An expression pedal can sweep level, drive, balance or speed. Output B can carry the dry signal instead of the right channel, and bypass is buffered.