hi folks,
here are some purepd representations of the [equalizer] [lowshelf] and [highshelf] objects for calculating eq biquad filter coefficients. i put these together as ggee was the only external lib dependency for a project which used these fairly extensively. the code is almost logic identical to the equivelent C internals, and i have avoided using [expr], so the math may look a little confusing.
i only ported the code for the objects i was using, but i will add the other eq-cookbook filters when i next get a chance.
ciao, dmotd