public void TestHighPass2()
{
const int order = 2;
const double fs = 44100d;
const double cutoffFrequency = 2000d;
const double error = 1e-4;
var coeff = new HighPassButterworthCoefficients(order, fs, cutoffFrequency);
var chain = coeff.Calculate();
var expected = new[]
{
new Biquad(0.817365347198867, -1.63473069439773, 0.817365347198867, 1, -1.60109239418362, 0.668368994611848),
};
Assert.AreEqual(1, chain.GetTransitionBands(fs).Count());
foreach (var f in chain.GetTransitionBands(fs))
{
Assert.AreEqual(f, cutoffFrequency, 5.0);
}
Assert.AreEqual(expected.Length, chain.Count);
for (int i = 0; i < expected.Length; i++)
{
Helpers.ValidateBiquad(expected[i], chain[i], error);
}
}
public void TestHighPass16()
{
const int order = 16;
const double fs = 31250d;
const double cutoffFrequency = 100d;
const double error = 1e-4;
var coeff = new HighPassButterworthCoefficients(order, fs, cutoffFrequency);
var chain = coeff.Calculate();
var expected = Helpers.LoadCsv(Resources.HighPass16).ToList();
Assert.AreEqual(1, chain.GetTransitionBands(fs).Count());
foreach (var f in chain.GetTransitionBands(fs))
{
Assert.AreEqual(f, cutoffFrequency, 1.0);
}
Assert.AreEqual(expected.Count, chain.Count);
for (int i = 0; i < expected.Count; i++)
{
Helpers.ValidateBiquad(expected[i], chain[i], error);
}
}