Digitech Synth Wah Envelope Filter Effect Pedal - UsedThe Digitech Synth Wah is a discontinued envelope filter pedal from the 2000s. It has seven different filter settings to choose from with three adjustable control knobs. These include: Sensitivity, Control, and Range. The used Synth Wah we have here is in very good condition with light wear on the edges and sides of the pedal. No original box is included.