The Moog Music MF-102 is a ring modulator effect pedal with a voltage-controlled carrier oscillator and a voltage-contolled dual-waveform LFO. The MF-102 Ring Modulator is an award winning effect designed by Bob Moog. It contains an analog Ring Modulator with a built in Carrier Oscillator and LFO. Used with guitars, basses, keyboards, samples, or recorded tracks, the MF-102 can create subtle, or completely over-the-top effects. Uncontaminated by the digital world!