Moog Moogerfooger MF-107 FreqBox (Black)

The black Moogerfooger MF-107 FreqBox from Moog is an analog effect for instrument- and line-level sources that creates sound by having your input signal modulate its built-in VCO. The VCO has a continuously variable Waveshape, and can be frequency modulated (FM) by the input signal or by an adjustable envelope follower that tracks the dynamics of your input signal. Your input signal also can be used to modulate the amplitude of the VCO.