Is it possible to build a real-time 3-band parametric EQ
with both boost+ / cut-
and with Q and a wide f range
using [biquad~] or some other method?
There is something called [equalizer] in externals/ggee/filters
but it is only a single band.
I don't think I can just sum 3 bands like this.
Yes I can sum Bandpass filters output together
but not band reject.
It seems to me I need to do build a complex response
curve and perform the entire filter operation in a single process.