public void BiquadXover2NdOrder()
{
var butter2Lp1000A = DspCoefficients.GetXoverSOS(1000, 2, FilterType.ButterworthLp, 48000).First().DspParams();
var butter2Lp1000B = new[] { 0.003916126660547, 0.007832253321095, 0.003916126660547, 1.815341082704568, -0.831005589346758 };
Assert.IsTrue(butter2Lp1000A.SequenceEqual(butter2Lp1000B, new DspParamComarer()));
}
public void BiquadXover1StOrder()
{
var x = DspCoefficients.GetXoverSOS(1000, 1, FilterType.ButterworthLp, 48000).First().DspParams();
var y = new[] { 0.061511768503622, 0.061511768503622, 0, 0.876976462992757, 0 };
Assert.IsTrue(x.SequenceEqual(y, new DspParamComarer()));
}
public void BesselH4Th()
{
var x = DspCoefficients.GetXoverSOS(384, 4, FilterType.BesselLp, 48000).Select(n => n.DspParams());
var y =
new[]
{
new[]
{
0.000605188228776, 0.001210376457552, 0.000605188228776, 1.914182371441551,
-0.916603124356656
},
new[]
{
0.000605188228776, 0.001210376457552, 0.000605188228776, 1.914182371441551,
-0.916603124356656
},
};
var i = 0;
foreach (var d in x)
{
Assert.IsTrue(d.SequenceEqual(y[i++], new DspParamComarer()));
}
}
public void LinkWitz4Th()
{
var x = DspCoefficients.GetXoverSOS(512, 4, FilterType.LinkWitzHp, 48000).Select(n => n.DspParams());
var y =
new[]
{
new[]
{
0.953714080094688, -1.907428160189375, 0.953714080094688, 1.905284625122248,
-0.909571695256502
},
new[]
{
0.953714080094688, -1.907428160189375, 0.953714080094688, 1.905284625122248,
-0.909571695256502
},
};
var i = 0;
foreach (var d in x)
{
Assert.IsTrue(d.SequenceEqual(y[i++], new DspParamComarer()), "failed on biquad " + (i - 1));
}
}
public void LinkWitz6Th()
{
var x = DspCoefficients.GetXoverSOS(384, 6, FilterType.LinkWitzLp, 48000).Select(n => n.DspParams());
var y =
new[]
{
new[]
{
0.000601309320184, 0.001202618640367, 0.000601309320184, 1.901913563002136,
-0.904318800282870
},
new[]
{
0.000616045308739, 0.001232090617477, 0.000616045308739, 1.948522813110796,
-0.950986994345750
},
new[]
{
0.000616045308739, 0.001232090617477, 0.000616045308739, 1.948522813110796,
-0.950986994345750
},
};
var i = 0;
foreach (var d in x)
{
Assert.IsTrue(d.SequenceEqual(y[i++], new DspParamComarer()), "failed on biquad " + (i - 1));
}
}
public void Bessel2Nd()
{
var x = DspCoefficients.GetXoverSOS(10000, 2, FilterType.BesselHp, 48000).First().DspParams();
var y =
new[]
{
0.342719267599336, -0.685438535198671, 0.342719267599336, 0.281858695809837, -0.089018374587505
};
Assert.IsTrue(x.SequenceEqual(y, new DspParamComarer()));
}
public void LinkWitz2Nd()
{
var x = DspCoefficients.GetXoverSOS(512, 2, FilterType.LinkWitzHp, 48000).First().DspParams();
var y =
new[]
{
0.936180987547197, -1.872361975094395, 0.936180987547197, 1.870257846804933, -0.874466103383856
};
Assert.IsTrue(x.SequenceEqual(y, new DspParamComarer()));
}
public void SosXOver3RdOrder()
{
var butter3Lp1000A = DspCoefficients.GetXoverSOS(1000, 3, FilterType.ButterworthLp, 48000).Select(n => n.DspParams());
var butter3Lp1000B =
new[]
{
new [] { 0.061511768503622, 0.061511768503622, 0, 0.876976462992757, 0 },
new [] { 0.004015505022858, 0.008031010045716, 0.004015505022858, 1.861408444532108, -0.877470464623539 }
};
var i = 0;
foreach (var d in butter3Lp1000A)
{
Assert.IsTrue(d.SequenceEqual(butter3Lp1000B[i++], new DspParamComarer()));
}
}
public void BesselH3Rd()
{
var x = DspCoefficients.GetXoverSOS(10, 3, FilterType.BesselHp, 48000).Select(n => n.DspParams());
var y =
new[]
{
new[]
{
0.999345929525232, -0.999345929525232, 0, 0.998691859050465, 0
},
new[]
{
0.998867231486796, -1.997734462973593, 0.998867231486796, 1.997733607207339,
-0.997735318739846
}
};
var i = 0;
foreach (var d in x)
{
Assert.IsTrue(d.SequenceEqual(y[i++], new DspParamComarer()));
}
}
/// <summary>
/// Sends a multi biquad passband filter
/// there should be enough biquads assigned to this filter
/// </summary>
public override IEnumerable <PeqParam> GetParamData()
{
return(DspCoefficients.GetXoverSOS(PEQDataModel.Frequency, PEQDataModel.Order,
PEQDataModel.FilterType, DspCoefficients.Fs).Select((source, index) =>
GetSosParamPackage(source, GetBiquad(index))));
}