I got bored and built a 2x2 MIMO FxNLMS ANC simulator in Julia + C23

Hey folks, Today morning was aggressively boring, so naturally I ended up building a 2x2 MIMO active noise control simulator. I have recently started poking around the border between DSP and control systems, and for some reason I am enjoying it far more than expected. I also do not entirely know why I am posting my random experiments, but maybe someone finds this useful, finds a cursed coefficient, or tells me that I have misunderstood acoustics in a particularly creative way. The project is ...