Dither Mask, is one of a series of masks based on electromechanical methods of voice modulation. Each mask is based upon a CNC machined Aluminum mask (made from a solid block of 6 in x 6inch Aluminum), that has a different attachment for different effects. The Dither Mask utilizes a servomotor rotating a circular door to allow the sound to escape and be silenced. The effect upon opening and closing is gradual like a fader on a channel. The actuation is controlled through a custom module with an Arduino brain and a knob that sweeps the door open and closed.