public void DisplaySpectrogram(string filePath)
{
// analyser = new ShortTimeFourierTransform(filePath, double.Parse(fResolutionTxt.Text), double.Parse(timeStepTxt.Text));
analyser = new ShortTimeFourierTransform(filePath, int.Parse(fftSizeTxt.Text), double.Parse(timeStepTxt.Text));
spectrogram = new RainbowSpectrogram(analyser, int.Parse(textBox1.Text));
analyser.Ended += OnEnded;
OriginalBitmap = spectrogram.Generate();
pictureBox1.Image = (Bitmap)OriginalBitmap.Bitmap.Clone();
}