13 Feb
2014
13 Feb
'14
11:35 p.m.
Hi list,
just wondering if I am getting something wrong plotting the phase response of lop~ using the abstractions filter-graph1.pd and filter-graph2.pd as exemplified in 3.audio.examples/H10.measurement.pd
For a simple one-zero lowpass filter using [rzero~ -1] the phase response is plotted going from 0 to pi/2 (eg. 90°) at nyquist frequency. I always thought that it would be 0^ to -90° though.
Also a highpass [rzero~ 1] filter's phase is plotted as going from -90° to 0° instead of the 90° to 0° I know from some textbooks.
Is there a mistake I could have had made? I mean, things sound alright, but I am just wondering.
best, P