private static void TestBandPass(int order, double fs, double f1, double f2, double[] expected, double error, bool scale)
{
var coeff = new BandPassLeastSquareCoefficients(order, fs, f1, f2) {UseScaling = scale};
var chain = coeff.Calculate();
Assert.AreEqual(expected.Length, chain.Count);
for (int i = 0; i < expected.Length; i++)
Assert.AreEqual(expected[i], chain[i], error);
}
public void TestBandPassLeastSquareFiltering()
{
const int order = 256;
const int fs = 44100;
const double f1 = 1000d;
const double f2 = 4000d;
const int cycles = 10;
double[] frequencies = { 330, 1870, 9790 };
var validFrequencies = frequencies.SkipWhile(f => f < f1).TakeWhile(f => f < f2);
var coeff = new BandPassLeastSquareCoefficients(order, fs, f1, f2);
TestFilter(order, fs, cycles, coeff, frequencies, validFrequencies);
}
