I don't know if this is what you're asking, but iirc it's really just a matter of substituting exp(j*2*pi*fc/Fs) for z in the transfer function. I can send a Pd patch illustrating it later, if you like.
.mmb On Sunday, February 6, 2011, Hans-Christoph Steiner <[email protected]> wrote: > > I've started to write a GUI for generating biquad coefficients (something > like Max/MSP's [filtergraph~]). I've gotten the GUI interaction working > well, now I'm looking for the algorithms for generating a plot of the > frequency response of a given set of biquad coefficents? It'll end up being > Tcl, but I can easily read C, Csound, Java, Perl, Python, etc. > > .hc > > ---------------------------------------------------------------------------- > > All mankind is of one author, and is one volume; when one man dies, one > chapter is not torn out of the book, but translated into a better language; > and every chapter must be so translated.... -John Donne > > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > -- Mike Moser-Booth [email protected] _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
