Analog Tone Matrix. Inspired by this. High level block diagram:
Follow along here for more info!
sim/: LTSpice simulation testbenches/schematicsplot/: Sim data + Python plotting codekicad/: KiCad schematics + PCB layout
Most of the plot/ folder is just data dumps. I use Spyder as my MATLAB-esque IDE, which means I get to be lazy and use cells instead of neatly defining functions or files. Would not recommend running by itself - too many plots!