Wednesday, May 18, 2022
Chaotic Pressure Array Synthesizer
video upload by Peter Corbett
"This was my team's submission to our 4th year EE Capstone project. The synth features chaotically phase-modulated oscillators (Lorenz Attractor), and a dynamic and expressive 2 dimensional pressure input device:
X-axis = pitch
Y-axis = filter cutoff + chaotic mod index
Z-axis (pressure) = amplitude + filter cutoff
The pressure pad is comprised of a sheet of Velostat sandwiched between vertical and horizontal strips of conductive tape. Shift registers apply voltage to each column sequentially, and analog multiplexers scan each row to build an array of pressure readings for all the cells. This is driven by an ESP32, which in turn transmits UART data to a Raspberry Pi 4B.
A python script receives pressure data and parses it into note events. Higher order interpolation methods are employed to capture inter-cell peaks and improve positional resolution. The DSP synth engine is built in PureData with a TouchOSC front end."
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MATRIXSYNTH - EVERYTHING SYNTH
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