Wah

Here is an awesome wah I built, it is basically a multiple op-amp biquadratic filter with a selector switch for the range and a pot for resonance. I can take it from subtle filtering to full out oscillation. It operates from sub octave range to about the middle of a guitar spectrum. I use it for super cool bass sweeping, it rattles everything in the house, even at low volumes. It reminds me of a MuTron filter pedal, only a tad bit better in my opinion.

Done