PD on an Iot-Class Processor

Audio installations and other sound art projects sometimes call for large numbers of inexpensive digital audio systems. We have adapted the Pure Data environment to an embedded system using the Espressif ESP32 processor. We find that it is possible to run Pd on an ESP32-based audio development board costing about 20 USD. We were able to build a complete system for a particular art project that can respond to wireless commands and synthesize a continuous stream of sound, while only dissipating about 925 milliwatts. This approach should be adaptable to a range of other possible sound art projects.