Control the LFO using the Amount and Rate knobs and the Square/Sine waveform selector switch.
Amount determines the amount of LFO waveform that modulates the frequency of the carrier oscillator. When the knob is full counterclockwise, the carrier is unmodulated. Fully clockwise, the carrier oscillator is modulated over a range of three octaves.
Rate determines how fast the LFO oscillates, from 0.1 Hz (one cycle every ten seconds) to 25 Hz (twenty-five cycles per second). The LFO light blinks to give a visual indication of the LFO rate.
The Square/Sine switch selects either a square or sine waveform. The square wave produces trill effects, whereas the sine waveform produces vibrato and siren effects.
Operating at the selected frequency, the carrier oscillator provides one input to the ring modulator, with the other coming from the input signal.
The Mix control blends the input signal and the Ring Modulator output. You hear only the input signal when the knob is counterclockwise, and only the ring modulated signal with the knob fully clockwise.
Bypass glows either red (bypassed) or green (not bypassed) to show whether or not the effect is in the signal path.