private static void OnMaximumFrequencyChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
SpectrumAnalyzer spectrumAnalyzer = o as SpectrumAnalyzer;
if (spectrumAnalyzer != null)
{
spectrumAnalyzer.OnMaximumFrequencyChanged((int)e.OldValue, (int)e.NewValue);
}
}