public void BuildSpectrogram(string _wavPath)
{
double[] audio; int sampleRate;
(audio, sampleRate) = ReadWAV(_wavPath);
var sg = new SpectrogramGenerator(sampleRate, fftSize: FFTSize, stepSize: FFTStepSize, maxFreq: MaxFrequency);
//sg.SetFixedWidth(SpectrogramWidth);
sg.Add(audio);
sg.SetColormap(ImageColormap);
//sg.SetFixedWidth(1024);
var bmp = sg.GetBitmapMel(melBinCount: 103, dB: true, dBScale: 10);
bmp.Save(ImagePath, System.Drawing.Imaging.ImageFormat.Jpeg);
//sg.SaveImage(ImagePath, dB: true, dBScale: 10);
}
public void Test_Make_CommonColormaps()
{
(double[] audio, int sampleRate) = AudioFile.ReadWAV("../../../../../data/cant-do-that-44100.wav");
int fftSize = 1 << 12;
var spec = new SpectrogramGenerator(sampleRate, fftSize, stepSize: 700, maxFreq: 2000);
spec.SetWindow(FftSharp.Window.Hanning(fftSize / 3)); // sharper window than typical
spec.Add(audio);
// delete old colormap files
foreach (var filePath in System.IO.Directory.GetFiles("../../../../../dev/graphics/", "hal-*.png"))
{
System.IO.File.Delete(filePath);
}
foreach (var cmap in Colormap.GetColormaps())
{
spec.SetColormap(cmap);
spec.SaveImage($"../../../../../dev/graphics/hal-{cmap.Name}.png");
Debug.WriteLine($"");
}
}
private void cbColormap_SelectedIndexChanged(object sender, EventArgs e)
{
spec.SetColormap(cmaps[cbColormap.SelectedIndex]);
}
