private static byte[] ComputeFFT(double[] fftRealInput, int sampleFrequency)
{
double[] fftRealOutput = new double[fftRealInput.Length];
double[] fftImaginaryOutput = new double[fftRealInput.Length];
double[] fftAmplitude = new double[fftRealInput.Length];
FourierTransform.Compute(
1024,
fftRealInput,
null,
fftRealOutput,
fftImaginaryOutput,
false);
FourierTransform.Norm(1024, fftRealOutput, fftImaginaryOutput, fftAmplitude);
return(FourierTransform.GetPeaks(fftAmplitude, null, sampleFrequency));
}
