![]() Two copies of Pure Data are run on separate cores of the dual core processor. The Arduinos are loaded with the Firmata firmware. Two Arduino Micro controllers communicate with the computer via USB. ![]() It runs the real time kernel and JACK audio server and PureData for an optimized real time performance environment. The Pd Machine runs on Xbuntu Linux, an open source linux operating system. The PD effects included thus far include a ring modulator sequencer, samplers, and pd versions of free Soundhack plugins such as Decimate and the Bubbler (which is a delay granular synthesis effect). The open source aspect of the software, as well as the ability to change or write new and exotic effects, frees the user from the limitations of on-the-self effects units sold on the market today. ![]() The user can define which parameter each knob or switch controls, completely alter the patches, as well as change the routing of the different patches by uploading different presets. 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.Īn important aspect of these units is that the user is able to upload different PD patches and presets via the removable flash drive / hard drive. Knobs, buttons, photocells, and joystick movements control PD parameters effecting the audio output signal. Sound cards and breakout boxes with 1/4” mono input and output jacks are mounted inside. They are running the open source computer music program Pure Data (PD) on the Linux operating system. We (Bryan Oczkowski and Bobby Bray) have assembled two computers as two stand alone real time audio processing units.
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