On Thu, Nov 19, 2020 at 10:05:00PM +0100, Fons Adriaensen wrote: > Hello all, > > Some people have asked me to provide a bit more documentation > on the state-variable filters I used in zita-eq1 and zita-jacktools. > > So I've written a short technical note on this. You can find it at > > <http://kokkinizita.linuxaudio.org/papers/digsvfilt.pdf>
I wish I was good at maths! This makes it all look so simple, and it works well. I guess with the corrected parameters, you can't get it to self-oscillate without Q really being infinite? With the uncorrected parameters it seems to go "over unity" with Q set to about 10, but a soft clipper would stop it blowing up. It behaves well if you interpolate the c1 and c2 values to sweep the filter across a block of samples, which is handy. -- Gordonjcp _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
