Hello! I want to build a phase analyzer patch with fft and cartopol but i think i'm missing something about phase response theory because all i see is a random response.

in this patch i modified the plot~ help file. Can you point the errors in the patch? I have to use a different source than noise~ to see plots like this? http://www.analog.com/library/analogdialogue/archives/43-09/active_filters.html

Any help would be appreciated. Thanks.