Hey guys,
This is an abstraction that can plot the frequency and phase response of biquad filter coefficients. You can send it more than one filter at once, so you can make some nice EQ plots. The help patch illustrates it by using the [multimode.mmb] abstraction I posted here yesterday:
http://puredata.hurleur.com/viewtopic.php?pid=24268#p24268
and also [filtercoeff.mmb] from here:
http://puredata.hurleur.com/sujet-5342-signal-controlled-filters
Should be pretty self-explanatory.