MF-107 FreqBox – The MF-107 FreqBox ™ is different from other effects – the effected sound is not a processed version of your input signal, but the sound of the input signal modulating an internal oscillator. It contains a VCO with continuously variable waveshape, and the capacity to modulate that Oscillator in the following ways, VERY UNIQUE sounding not for the weak of heart and traditional player ! GotoMoog 107 Freqbox !