Abstract: A pedal sound modification device is disclosed for varying an electrical signal. The device includes a plate pivotably coupled to a base. A slide potentiometer is coupled to the base and has a slider arm slidably engaging a linear potentiometer. The linear potentiometer extends between proximal slide end and a distal slide end. A linkage rod is pivotably coupled to the plate and the slide potentiometer for displacing the slide arm relative to the linear potentiometer upon a pivoting displacement of the plate relative to the base. The plate contacts the base for defining a proximal slide arm stop and positions the slide arm immediately adjacent to the proximal slide end for preventing damage to the slide potentiometer. The plate contacts the base for defining a distal slide arm stop and positions the slide arm immediately adjacent to the distal slide end for preventing damage to the slide potentiometer.