create filter module #23
Description
If you start with a signal, take the FFT, edit the complex numbers, then take the iFFT, you result with a signal whose spectral components can be filtered. Create a module to make filtering easy. Something like:
double[] audio = ReadWav("test.wav");
double[] filtered1 = FftSharp.Filter.LowPass(audio, frequency: 500);
double[] filtered2 = FftSharp.Filter.HighPass(audio, frequency: 500);
double[] filtered3 = FftSharp.Filter.BandPass(audio, frequency1: 300, frequency2: 500);
double[] filtered4 = FftSharp.Filter.BandStop(audio, frequency1: 300, frequency2: 500);