Ive worked on some sonification projects that used signals from xbox kinect lidar, piezos, and other sensors. Co-author on paper i wrote developed a "strummable" theremin that divided physical space with invisible "strings" of various tunings. We preferred running synthesis on PC when possible and just outputting midi and OSC, as DSP on ESP32 has limits for what can be achieved in under 5-10ms. If the goal is hardware audio output, you may need to look into dedicated DSP chips and an audio shield for better DAC- but for prototyping can easily bang a square wave through any of esp32 pins