private void computeButton_Click(object sender, EventArgs e)
{
var frameSize = float.Parse(analysisFftTextBox.Text);
var hopSize = float.Parse(hopSizeTextBox.Text);
var modulationFftSize = int.Parse(longTermFftSizeTextBox.Text);
var modulationHopSize = int.Parse(longTermHopSizeTextBox.Text);
// ===== test modulation spectrum for Mfcc features =====
//
//var mfccExtractor = new MfccExtractor(13, _signal.SamplingRate,
// frameSize: frameSize,
// hopSize: hopSize);
//var vectors = mfccExtractor.ComputeFrom(_signal);
//FeaturePostProcessing.NormalizeMean(vectors);
//_extractor = new AmsExtractor(_signal.SamplingRate,
// frameSize, hopSize,
// modulationFftSize, modulationHopSize,
// featuregram: vectors.Select(v => v.Features));
_extractor = new AmsExtractor(frameSize, hopSize,
modulationFftSize, modulationHopSize,
filterbank: _filterbank, window: WindowTypes.Hamming);
_features = _extractor.ComputeFrom(_signal);
_featIndex = 0;
infoLabel.Text = $"{_features.Count}x{_features[0].Features.Length}";
DrawEnvelopes(_extractor.Envelopes);
DrawModulationSpectrum(_extractor.MakeSpectrum2D(_features[_featIndex]));
}