I'm working through the complex number pages at http://www.katjaas.nl/home/home.html using PD as my lab. Is this the right place to discuss? If not, please let me know where I should be posting my questions.
I'm currently struggling with her description of the resonator at the heart of a biquad filter .
Up to this point I've been able to build working examples based on the signal flow diagrams and duplicate her results, but for some reason this one is not behaving. From her discussion I expected to see huge eliptical orbits, but the best I can achieve is a pulse train at half Nyquist when omega=pi/2 and r=1. Otherwise I just get tiny single pulses. What am I misunderstanding?
Here's my patch: biquad resonator.pd. You can totally ignore Gem unless you want to see the Lissajous curve (which is dull given it's current broken state).