[Scilab-users] Plotting properties of digital audio filters

[fred_audio_dsp]

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 at 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



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