Ben
Just noticed the link at line 2342 in
~/extempore/libs/core/audio_dsp.xtm
Is broken.
I suspect this might be the correct link:
https://www.musicdsp.org/en/latest/_downloads/3e1dc886e7849251d6747b194d482272/Audio-EQ-Cookbook.txt
Although not sure as I’m not up to speed on filter design. I did try to do a Digital Signal Processing course a few years ago but found the maths difficult and didn’t finish. https://www.coursera.org/learn/dsp1
I wonder if the link above gives a clue to manipulating the parameters of a filter?
Just puzzled.
Regards George