The circuitry of the Snow White Auto Wah is based on a remote wah circuit from a 1991 BJF rack mount, with redesigns for the envelope controls. It's tuned like a real wah and features lightning-fast tracking and accuracy that isn't frequently seen in auto wahs. Four controls allow you to chisel out your tone, and the unique Decay knob controls how fast the filter frequency returns to its resting point for a funky or more traditional wah effect.