Solved

# Audio filter design - how to calculate kernel order from cutoff frequency

Posted on 2004-10-25

I have written a filter design wizzard to go with an audio DSP application, which offers the following FIR windowing functions as kernels: Blackman, Hamming, Hanning, Triangular and Rectangular. It allows low pass and high pass filtering. It works fine, but I just don't know how to calculate an appropriate filter order to give the desired cutoff frequency. I need to know how to calculate this for EACH of the above windowing functions.

Thanks.