Hi, By making the FFT size of the form 2*2^x, I managed to get more of an expected result.
Still the phase response of the filters I analyze drops off to -180° unexpectedly, as illustrated in the plot below (without frequency vector applied because I'm just testing). This is a peak filter, -3dB@500Hz, Q=1. Note that any kind of phase unwrapping did not produce any different result. <http://mailinglists.scilab.org/file/n4033215/plot3.png> I have included a zip file of the captured impulse response. response.zip <http://mailinglists.scilab.org/file/n4033215/response.zip> Regards, Frederik -- View this message in context: http://mailinglists.scilab.org/Plotting-properties-of-digital-audio-filters-tp4033198p4033215.html Sent from the Scilab users - Mailing Lists Archives mailing list archive at Nabble.com. _______________________________________________ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users