public static void Main(string[] argv)
{
ISampleProvider decoder = new AudioFileReader(FILE);
SpectrumProvider spectrumProvider = new SpectrumProvider(decoder, 1024, HOP_SIZE, true);
float[] spectrum = spectrumProvider.nextSpectrum();
float[] lastSpectrum = new float[spectrum.Length];
List <List <float> > spectralFlux = new List <List <float> >();
for (int i = 0; i < bands.Length / 2; i++)
{
spectralFlux.Add(new List <float>());
}
do
{
for (int i = 0; i < bands.Length; i += 2)
{
int startFreq = spectrumProvider.getFFT().FreqToIndex(bands[i]);
int endFreq = spectrumProvider.getFFT().FreqToIndex(bands[i + 1]);
float flux = 0;
for (int j = startFreq; j <= endFreq; j++)
{
float @value = (spectrum[j] - lastSpectrum[j]);
@value = (@value + Math.Abs(@value)) / 2;
flux += @value;
}
spectralFlux[i / 2].Add(flux);
}
System.Array.Copy(spectrum, 0, lastSpectrum, 0, spectrum.Length);
} while((spectrum = spectrumProvider.nextSpectrum()) != null);
List <List <float> > thresholds = new List <List <float> >();
for (int i = 0; i < bands.Length / 2; i++)
{
List <float> threshold = new ThresholdFunction(HISTORY_SIZE, multipliers[i]).calculate(spectralFlux[i]);
thresholds.Add(threshold);
}
Plot plot = new Plot("Multiband Spectral Flux", 1024, 512);
for (int i = 0; i < bands.Length / 2; i++)
{
plot.plot(spectralFlux[i], 1, -0.6f * (bands.Length / 2 - 2) + i, false, Color.Red);
plot.plot(thresholds[i], 1, -0.6f * (bands.Length / 2 - 2) + i, true, Color.Green);
}
new PlaybackVisualizer(plot, HOP_SIZE, FILE);
}
public static void Main(string[] argv)
{
ISampleProvider decoder = new AudioFileReader(FILE);
SpectrumProvider spectrumProvider = new SpectrumProvider(decoder, 1024, HOP_SIZE, true);
float[] spectrum = spectrumProvider.nextSpectrum();
float[] lastSpectrum = new float[spectrum.Length];
List<List<float>> spectralFlux = new List<List<float>>();
for(int i = 0; i < bands.Length / 2; i++) {
spectralFlux.Add(new List<float>());
}
do {
for(int i = 0; i < bands.Length; i+=2) {
int startFreq = spectrumProvider.getFFT().FreqToIndex(bands[i]);
int endFreq = spectrumProvider.getFFT().FreqToIndex(bands[i+1]);
float flux = 0;
for(int j = startFreq; j <= endFreq; j++)
{
float @value = (spectrum[j] - lastSpectrum[j]);
@value = (@value + Math.Abs(@value))/2;
flux += @value;
}
spectralFlux[i/2].Add(flux);
}
System.Array.Copy(spectrum, 0, lastSpectrum, 0, spectrum.Length);
} while((spectrum = spectrumProvider.nextSpectrum()) != null);
List<List<float>> thresholds = new List<List<float>>();
for(int i = 0; i < bands.Length / 2; i++)
{
List<float> threshold = new ThresholdFunction(HISTORY_SIZE, multipliers[i]).calculate(spectralFlux[i]);
thresholds.Add(threshold);
}
Plot plot = new Plot("Multiband Spectral Flux", 1024, 512);
for(int i = 0; i < bands.Length / 2; i++)
{
plot.plot(spectralFlux[i], 1, -0.6f * (bands.Length / 2 - 2) + i, false, Color.Red);
plot.plot(thresholds[i], 1, -0.6f * (bands.Length / 2 - 2) + i, true, Color.Green);
}
new PlaybackVisualizer(plot, HOP_SIZE, FILE);
}
