private async void openToolStripMenuItem_Click(object sender, EventArgs e)
{
var ofd = new OpenFileDialog();
if (ofd.ShowDialog() != DialogResult.OK)
{
return;
}
using (var stream = new FileStream(ofd.FileName, FileMode.Open))
{
var waveFile = new WaveFile(stream, true);
_signal = waveFile[Channels.Left];
}
var sr = _signal.SamplingRate;
var barkbands = FilterBanks.BarkBands(16, 512, sr, 100 /*Hz*/, 6500 /*Hz*/, overlap: false);
var barkbank = FilterBanks.Triangular(512, sr, barkbands);
var mfccExtractor = new MfccExtractor(_signal.SamplingRate, 13,
//filterbankSize: 40,
//lowFreq: 100,
//highFreq: 4200,
//lifterSize: 22,
preEmphasis: 0.97,
//filterbank: barkbank,
window: WindowTypes.Hamming);
_mfccVectors = mfccExtractor.ComputeFrom(_signal);
//FeaturePostProcessing.NormalizeMean(_mfccVectors); // optional
//FeaturePostProcessing.AddDeltas(_mfccVectors);
FillFeaturesList(_mfccVectors, mfccExtractor.FeatureDescriptions);
mfccListView.Items[0].Selected = true;
melFilterBankPanel.Groups = mfccExtractor.FilterBank;
mfccPanel.Line = _mfccVectors[0].Features;
using (var csvFile = new FileStream("mfccs.csv", FileMode.Create))
{
var header = mfccExtractor.FeatureDescriptions;
//.Concat(mfccExtractor.DeltaFeatureDescriptions)
//.Concat(mfccExtractor.DeltaDeltaFeatureDescriptions);
var serializer = new CsvFeatureSerializer(_mfccVectors, header);
await serializer.SerializeAsync(csvFile);
}
}
private async void openToolStripMenuItem_Click(object sender, EventArgs e)
{
var ofd = new OpenFileDialog();
if (ofd.ShowDialog() != DialogResult.OK)
{
return;
}
using (var stream = new FileStream(ofd.FileName, FileMode.Open))
{
var waveFile = new WaveFile(stream, true);
_signal = waveFile[Channels.Left];
}
var mfccExtractor = new MfccExtractor(13,
//frameSize: 0.03125,
//hopSize: 0.015625,
melFilterbankSize: 20,
//lowFreq: 100,
//highFreq: 4200,
//lifterSize: 22,
preEmphasis: 0.95,
window: WindowTypes.Hamming);
_mfccVectors = mfccExtractor.ComputeFrom(_signal);
//FeaturePostProcessing.NormalizeMean(_mfccVectors);
//FeaturePostProcessing.AddDeltas(_mfccVectors);
FillFeaturesList(_mfccVectors, mfccExtractor.FeatureDescriptions);
mfccListView.Items[0].Selected = true;
melFilterBankPanel.Groups = mfccExtractor.FilterBank;
mfccPanel.Line = _mfccVectors[0].Features;
using (var csvFile = new FileStream("mfccs.csv", FileMode.Create))
{
var header = mfccExtractor.FeatureDescriptions
.Concat(mfccExtractor.DeltaFeatureDescriptions)
.Concat(mfccExtractor.DeltaDeltaFeatureDescriptions);
var serializer = new CsvFeatureSerializer(_mfccVectors, header);
await serializer.SerializeAsync(csvFile);
}
}