The Moog MF-105 Moogerfooger MURF Analog Guitar Effect is the antidote to generic, boring effects. MURF stands for Multiple Resonance Filter Array, and the Moogerfooger MURF has 8 filters, each controlled by its own slider. The filters can be animated in up to 24 preset patterns. The rate of the patterns can be set by a knob, expression pedal, or plug a footswitch into the tap tempo input to match the rate to the tempo of your song. Rhythmic variations can be created by adjusting the levels of the filters. The Envelope control sets the shape of the modulation, which can be set for percolating techno rhythm or shimmering timbral morphing. Other controls on the Moog MF-105 Moogerfooger MURF include Input Drive, Output Level, and Wet/Dry Mix. Accepts any line- or instrument-level signal!