public void DetectOnsets(float sensitivity = 1.5f)
{
onsetDetection = new OnsetDetection(PCMStream, SAMPLE_SIZE);
// Has finished reading in the audio file
bool finished = false;
// Set the pcm data back to the beginning
SetTrackPosition(0);
do
{
// Read in audio data and find the flux values until end of audio file
finished = onsetDetection.AddFlux(ReadMonoPCM());
}while (!finished);
// Find peaks
onsetDetection.FindOnsets(sensitivity);
}
public void Analyze()
{
amplitudeDetection = new AmplitudeDetection();
onsetDetection = new OnsetDetection(sampleRate, sampleSize, timePerSample);
heldNoteDetection = new HeldNoteDetection();
pcmStream.Position = 0;
int nSample = 0;
do
{
float[] samples = ReadMonoPCM();
if (samples == null)
{
break;
}
float time = nSample * timePerSample;
fft.RealFFT(samples, true);
float[] fftSpectrum = fft.GetPowerSpectrum();
amplitudeDetection.AnalyzeSpectrum(fftSpectrum, time);
heldNoteDetection.AnalyzeSpectrum(fftSpectrum, time);
onsetDetection.AddFlux(fftSpectrum);
nSample++;
}while (true);
amplitudeDetection.AbsAndNormalize();
// Find peaks
onsetDetection.FindOnsets(1.5f);
onsetDetection.NormalizeOnsets();
AddOnsets(SongElements);
heldNoteDetection.AddHeldNotes(SongElements);
}
