STOY Screaming Foot is a true bypass wah wah. Based on the original American Wah Wah. But with slightly different layout and components. In our opinion better overall sound with a larger frequency response. It works equally well on both Guitar and bass. The Screaming Foot delivers deep and high tones that cut through the mix with ease. Put your favorite fuzz in front and you get a wild screaming sound and feedback controller. Use it as the first pedal in the line and get a subtle wah wah sound or use it as a scratch machine Tom Morello style.