We (Bryan Oczkowski and Bobby Bray) have assembled two computers as two stand alone real time audio processing units. They are running the open source computer music program Pure Data (PD) on the Linux operating system. Sound cards and breakout boxes with 1/4” mono input and output jacks are mounted inside. Knobs, buttons, photocells, and joystick movements control PD parameters effecting the audio output signal. We have created two separate models: a floor unit designed to be used as a stomp box for electric stringed instruments such as guitar, and a unit focused on hand controls.