Death by Audio Interstellar Overdriver w/Master Volume The Interstellar Overdriver is a real overdrive pedal blasting your amp with your sound. The knob works giving a slight boost all the way counterclockwise to a beautiful harmonicly rich overdrive maxed out. It is designed to work the same way as old tube amps - the more you turn it up, the better it sounds. Now introducing the new Interstellar Overdriver w/Master Volume control. Same great warm overdrive with the ability to kick back the output volume while keeping the sweetness.