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DSP Filter design software?
post Nov 20 2009, 19:53
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Can someone please recommend me a good Digital Filter design software? May be I'm asking something impossible, but if it could be free software, will be perfect.

Thank you.

This post has been edited by Ginswich: Nov 20 2009, 19:57
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post Nov 20 2009, 20:10
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I'm not sure how specifically based on filter design you want the program to be, but a good piece of mathematical software like Matlab (expensive) or Octave (free, but runs on Linux) can do all sorts of filter design. I am not aware of dedicated programs for DSP filter creation. I am also interested, though.
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post Nov 20 2009, 22:09
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Doesn't Octave run on windows and osx as well?


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post Nov 21 2009, 00:31
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There is a Windows port of Octave here


and a graphical user interface here


I think I installed this once for testing earlier this year. Looked fine. Don't know if it offers the filter design functionality you need.


If I don't reply to your reply, it means I agree with you.
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post Nov 21 2009, 01:41
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SynthMaker would be another approach
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post Nov 21 2009, 05:18
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How about a good old stream of ints in C++ or Java. Is there anything to wish for?
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post Jan 27 2010, 22:46
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Scilab may be a possibility ...

Scilab website
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post Jan 29 2010, 20:20
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I can also recommend Octave. Try to get a recent version (>= 3.0). The filter design functions (among other things) used to be in a seperate project called "octave-forge" but as far as I can tell they merged it into Octave. It's pretty much the same as Matlab's DSP toolbox.

Off the top of my head: remez, butter, cheby, levinson, ellip, sinc, blackman, ... :-)
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post Aug 22 2013, 00:50
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Some alternatives that I am also aware of include:

Command-line style, so requires a bit more figuring out and I guess a bit clunkier to interact with:

1. Gnu Octave - (http://www.gnu.org/software/octave)
2. SciPy - (http://www.scipy.org)
3. Scilab - (http://www.scilab.org)
4. Matlab - (http://www.mathworks.com) (Not free. Maybe in the $2000-$3000 range once you get the software and the required toolboxes etc).

Interactive - Easier to figure out and provides better feedback between the user and the design:

1. MicroModeler DSP - (http://www.micromodeler.com) - Web based, graphical, interactive. Looks pretty good.
2. WinFilter - (http://www.winfilter.20m.com) - Windows based, graphical, interactive.
3. MkFilter - (http://www-users.cs.york.ac.uk/~fisher/mkfilter) - Web based, CGI style
4. ScopeFIR/ScopeIIR - (http://www.iowegian.com) - Windows based, graphical, interactive. $300-$600 range.
5. NI LabVIEW Digital Filter Design Toolkit - (http://sine.ni.com/nips/cds/view/p/lang/en/nid/209040) - Windows, Graphical, only works with labview ($3195.62) + Toolkit ($1035)
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