static IFilter GetFilter()
{
double Fl = Common.Normalize(5000);
double Fh = Common.Normalize(15000);
LowPassFir lpf = new LowPassFir(16, Fl);
BandPassFir bpf = new BandPassFir(16, Fl, Fh);
HighPassFir hpf = new HighPassFir(16, Fh);
PeakingEqualizer peql = new PeakingEqualizer(Common.Normalize(900), 3, 1.5);
PeakingEqualizer peqm = new PeakingEqualizer(Common.Normalize(8000), 5, 2);
PeakingEqualizer peqh = new PeakingEqualizer(Common.Normalize(20000), 2, 4);
Delay dl = new Delay(4);
Delay dm = new Delay(8);
Delay dh = new Delay(16);
#if OUTPUT_COEF
using (StreamWriter writer = new StreamWriter("coef.txt"))
{
Write(writer, "LPF", lpf);
Write(writer, "BPF", bpf);
Write(writer, "HPF", hpf);
Write(writer, "PEQ L", peql);
Write(writer, "PEQ M", peqm);
Write(writer, "PEQ H", peqh);
Write(writer, "DLY L", dl);
Write(writer, "DLY M", dm);
Write(writer, "DLY H", dh);
}
#endif
IFilter low = new SerialConnector(new IFilter[] { lpf, peql, dl });
IFilter mid = new SerialConnector(new IFilter[] { bpf, peqm, dm });
IFilter hig = new SerialConnector(new IFilter[] { hpf, peqh, dh });
IFilter filter = new Mixer(
new IFilter[] { low, mid, hig },
new Double[] { 2, 1, 0.5 });
return(filter);
}
static void _Main(string[] args)
{
const int N = 1024;
double[] x = new double[N];
IFilter filter = new ShelvingEqualizer(Common.Normalize(1000), 1);
// インパルス応答取得
filter.Clear();
/*
* filter.GetValue(1);
* for(int i=0; i<16; ++i)
* filter.GetValue(0);
*/
filter.GetValue(1);
for (int i = 1; i < N; ++i)
{
x[i] = filter.GetValue(0);
}
#if TIME_SEQUENCE
int n = N;
double[] t = new double[n];
for (int i = 0; i < n; ++i)
{
t[i] = i;
}
Graph.GraphForm gf = new Graph.GraphForm();
gf.Graph.AddEntry(t, x, new Pen(Color.Crimson));
gf.Graph.SetXAxis(0, n, 5, new Font(FontFamily.GenericSerif, 12), new SolidBrush(Color.Black));
gf.Graph.SetYAxis(0, 2, 5, new Font(FontFamily.GenericSerif, 12), new SolidBrush(Color.Black));
gf.Size = new Size(640, 480);
gf.ShowDialog();
#elif PHASE
Spectrum spec = Spectrum.FromTimeSequence(x, 1);
int n = spec.Count;
double[] t = new double[n];
for (int i = 0; i < n; ++i)
{
t[i] = i;
}
double[] y = spec.GetPhase();
Spectrum.Unwrap(y);
Graph.GraphForm gf = new Graph.GraphForm();
gf.Graph.AddEntry(t, y, new Pen(Color.Crimson));
gf.Graph.SetXAxis(0, n, 4, new Font(FontFamily.GenericSerif, 12), new SolidBrush(Color.Black));
gf.Graph.SetYAxis(-50, 0, 4, new Font(FontFamily.GenericSerif, 12), new SolidBrush(Color.Black));
gf.Size = new Size(640, 480);
gf.ShowDialog();
#elif GAIN
Spectrum spec = Spectrum.FromTimeSequence(x, 1);
int n = spec.Count;
double[] t = new double[n];
for (int i = 0; i < n; ++i)
{
t[i] = i;
}
double[] y = spec.GetAmplitude();
Graph.GraphForm gf = new Graph.GraphForm();
gf.Graph.AddEntry(t, y, new Pen(Color.Crimson));
gf.Graph.SetXAxis(0, n, 4, new Font(FontFamily.GenericSerif, 12), new SolidBrush(Color.Black));
gf.Graph.SetYAxis(0, 4, 4, new Font(FontFamily.GenericSerif, 12), new SolidBrush(Color.Black));
gf.Size = new Size(640, 480);
gf.ShowDialog();
#endif
#if false
const int N = 512;
double[] x = new double[N];
double[] x0 = new double[N];
double[] y0 = new double[N];
/*
* Random rnd = new Random();
* x0[0] = 1;
* x0[1] = 1;
* y0[0] = 0;
* y0[1] = 0;
* for(int i=1; i<N/2; ++i)
* {
* x0[2*i] = rnd.NextDouble();
* x0[2*i+1] = rnd.NextDouble();
* y0[2*i] = -x0[2*i+1];
* y0[2*i+1] = x0[2*i];
* }
* Fft fft = new Fft(N);
* fft.Invert(x0);
* fft.Invert(y0);
* for(int i=0; i<N; ++i)
* x[i] = x0[i];
* //*/
//*
for (int i = 0; i < N; ++i)
{
x[i] = 100;
for (int k = 1; k < 200; ++k)
{
x[i] += short.MaxValue / 4 / k * Math.Cos(Math.PI / 512 * 32 * i * k);
}
x0[i] = x[i];
y0[i] = 0;
for (int k = 1; k < 200; ++k)
{
y0[i] += short.MaxValue / 4 / k * Math.Sin(Math.PI / 512 * 32 * i * k);
}
}
//*/
double[] y = Spectrum.HilbertTransform(x);
using (StreamWriter writer = new StreamWriter("z.csv", false, Encoding.Default))
{
/*
* for(int i=0; i<x.Length; ++i)
* writer.Write("{0},{1},{2},{3},{4}\n", i, x0[i], x[i], y0[i], y[i]);
* //*/
//*
Spectrum a0 = Spectrum.FromTimeSequence(x0);
Spectrum a = Spectrum.FromTimeSequence(x);
Spectrum b0 = Spectrum.FromTimeSequence(y0);
Spectrum b = Spectrum.FromTimeSequence(y);
for (int i = 0; i < a.Count; ++i)
{
writer.Write("{0},{1},{2},{3},{4}\n", i, a0[i].Abs, a[i].Abs, b0[i].Abs, b[i].Abs);
// writer.Write("{0},{1},{2},{3},{4}\n", i, a0[i].Arg, a[i].Arg, b0[i].Arg, b[i].Arg);
}
//*/
}
#elif false
const int N = 1024;
double[] lp = new double[N];
IFilter lpf = new LowPassFir(16, Common.Normalize(2000));
lp[0] = lpf.GetValue(1);
for (int i = 1; i < N; ++i)
{
lp[i] = lpf.GetValue(0);
}
double[] bp = new double[N];
IFilter bpf = new BandPassFir(16, Common.Normalize(2000), Common.Normalize(8000));
lp[0] = bpf.GetValue(1);
for (int i = 1; i < N; ++i)
{
bp[i] = bpf.GetValue(0);
}
double[] hp = new double[N];
IFilter hpf = new HighPassFir(16, Common.Normalize(8000));
lp[0] = hpf.GetValue(1);
for (int i = 1; i < N; ++i)
{
hp[i] = hpf.GetValue(0);
}
Fft fft = new Fft(N);
fft.Transform(1, lp);
fft.Transform(1, bp);
fft.Transform(1, hp);
using (StreamWriter writer = new StreamWriter("z.csv", false, Encoding.Default))
{
double la = Common.Amp(lp[0]);
double ba = Common.Amp(bp[0]);
double ha = Common.Amp(hp[0]);
writer.Write("{0},{1},{2},{3}\n", 0, la, ba, ha);
for (int i = 1; i < N / 2; ++i)
{
la = Common.Amp(lp[2 * i] * lp[2 * i] + lp[2 * i + 1] * lp[2 * i + 1]);
ba = Common.Amp(bp[2 * i] * bp[2 * i] + bp[2 * i + 1] * bp[2 * i + 1]);
ha = Common.Amp(hp[2 * i] * hp[2 * i] + hp[2 * i + 1] * hp[2 * i + 1]);
writer.Write("{0},{1},{2},{3}\n", i, la, ba, ha);
}
la = Common.Amp(lp[1]);
ba = Common.Amp(bp[1]);
ha = Common.Amp(hp[1]);
writer.Write("{0},{1},{2},{3}\n", N / 2, la, ba, ha);
}
#elif false
uint length;
double[] l;
double[] r;
FormatHeader header;
using (WaveReader reader = new WaveReader(@"TD100V00H030.wav"))
{
header = reader.Header;
length = reader.Length;
int tmp = reader.Read(length, out l, out r);
}
IFilter lpf = new LowPassFir(16, Common.Normalize(4500));
IFilter bpf = new BandPassFir(16, Common.Normalize(4500), Common.Normalize(10000));
IFilter hpf = new HighPassFir(16, Common.Normalize(10000));
for (int i = 0; i < l.Length; ++i)
{
double lp = lpf.GetValue(l[i]);
double bp = bpf.GetValue(l[i]);
double hp = hpf.GetValue(l[i]);
l[i] = lp + bp + hp;
}
if (r != null)
{
for (int i = 0; i < l.Length; ++i)
{
double lp = lpf.GetValue(r[i]);
double bp = bpf.GetValue(r[i]);
double hp = hpf.GetValue(r[i]);
r[i] = lp + bp + hp;
}
}
using (WaveWriter writer = new WaveWriter("z.wav", header))
{
writer.Write(l, r);
}
#elif false
using (StreamWriter writer = new StreamWriter("z.csv", false, Encoding.Default))
{
for (int i = 0; i < l.Length; ++i)
{
writer.Write("{0},{1},{2}\n", i, l[i], r[i]);
}
}
#endif
}