Model Switch - This switch is used to select three distinctly different types:
145 - Based on* the Leslie® 145.
L16 - Based on* the Fender® Vibratone (model 16)
122 - Based on* the Leslie® 122
Ramp Switch - Ramp controls how long it takes the speed to go from Fast to Slow. Select between a Fast, Medium, or Slow ramp time. SPEED CONTROLS
Fast Knob - Controls how quickly the horn and drum rotates. This control has a range that doesn't overlap with the Slow speed control.
Slow Knob - Controls how slowly the horn and drum rotates. This control has a range that doesn't overlap with the Fast speed control.
Drive Knob - This knob controls the amount of overdrive in the tube amplifier stage of Roto-Machine. Turn it up for that classic swirling growl! Blend Knob - Fine-tunes the mix balance of the horn and drum. Tap Tempo - Using the innovative ToneCore double-action footswitch, you can switch between the two different speed knobs. The Tap Tremolo indicator light flashes the tempo in green when the effect is ON and amber when the effect is OFF.