[Scilab-users] Plotting properties of digital audio filters

[Rafael Guerra]

Hi Frederik,
 
The unwrapping shown does not look good, it seems that you need to play further
with the unwrap input parameters.
Check if Scilab's function gives same results as this one:
http://mailinglists.scilab.org/unwrap-improvements-td4026370.html
 
You can compare the results with those from Scilab's phasemag function:
clf();
[phi,db]=phasemag(A,'c');
subplot(1,2,1)
plot2d("ln",f,db)
subplot(1,2,2)
plot2d("ln",f,phi)
 
Regards,
Rafael
 
-----Original Message-----
From: users [mailto:users-bounces at lists.scilab.org] On Behalf Of fred_audio_dsp
Sent: Friday, December 11, 2015 4:07 PM
To: users at lists.scilab.org
Subject: Re: [Scilab-users] Plotting properties of digital audio filters
 
Hi Rafael,
 
Thank you for your reply. I have tried unwrapping the phase for the 24dB/oct
low pass filter at 1kHz with scilab's unwrap() function. Plots included
below; I scaled the frequency axis linearily to better show what's going on.
 
without unwrap()
< <http://mailinglists.scilab.org/file/n4033202/plot1.png>
http://mailinglists.scilab.org/file/n4033202/plot1.png> 
 
with unwrap()
< <http://mailinglists.scilab.org/file/n4033202/plot2.png>
http://mailinglists.scilab.org/file/n4033202/plot2.png> 
 
Kind regards,
 
Frederik
 
 
 
--
View this message in context:
<http://mailinglists.scilab.org/Plotting-properties-of-digital-audio-filters-tp4
033198p4033202.html>
http://mailinglists.scilab.org/Plotting-properties-of-digital-audio-filters-tp40
33198p4033202.html
Sent from the Scilab users - Mailing Lists Archives mailing list archive at
Nabble.com.
_______________________________________________
users mailing list
 <mailto:users at lists.scilab.org> users at lists.scilab.org
 <http://lists.scilab.org/mailman/listinfo/users>
http://lists.scilab.org/mailman/listinfo/users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.scilab.org/pipermail/users/attachments/20151211/5c3b5b13/attachment.htm>