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I need to get coefficients for my FIR filter. I know my pass band lets say between 350 - 400 Hz And my stop band(s) lets say 200 - 250 and 500 - 500 Hz, The other regions in the spectrum I simply don't care. I want the Filter to be relaxed in this regions so be more effective in pass and stop bands.

I am looking for a library with a simple interface that I will just give passband and stop bands and number of taps. Than I will get my coefficients.

What I found is aquila example, but I couldn't see how can I define relaxed regions.

Can you please advise me a C/C++ library with relaxed, pass, stop bands and easy to use even for a computer scientist?

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    $\begingroup$ Why don't you design the filter in one of the many available packages (Octave, SciPy, etc.) and use the resulting coefficients in your filter implementation? $\endgroup$ – Matt L. Feb 20 '16 at 13:01
  • $\begingroup$ I need information on run time I have a big application depending on this coeffecients. $\endgroup$ – Kadir Erdem Demir Feb 20 '16 at 13:03
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    $\begingroup$ So you need to continually re-design the filter in real-time and it's no option to store coeffs for different specs in tables? $\endgroup$ – Matt L. Feb 20 '16 at 13:04
  • $\begingroup$ Yes, I am doing microphone array simulation with speaker verification. I found the speaker on run time in the room that run in simulation via speaker verification. And I find the strong noises by their energy in the same radius. Their location can be changed according to the setup. I need to put nulls in to positions of noises and ones in to position of speaker rest regions can be relaxed. Coefficients will assign to my mic. array aparture weights. $\endgroup$ – Kadir Erdem Demir Feb 20 '16 at 13:17
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    $\begingroup$ Wouldn't you normally do this with an adaptive filter, not with a fixed filter that is changed all the time? $\endgroup$ – Matt L. Feb 20 '16 at 13:48

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