void UpdateFilter(IFilter fil)
{
// calc the Freq response
FxVectorF power = fil.GetFrequencyResponse(256);
// scale down
power.Divide(power.Max());
// scale up
power.Multiply(125.0f / 4117.0f);
// add the power of the filter to the plot
plot_signal_spectrum.RefreshPlot(power, 1);
// add the power of the filter to seperate plot with auto fitting of power
plot_filter_spectrum.RefreshPlot(power, 0);
plot_filter_spectrum.FitPlots();
// refresh the canvas
canvas_audio.ReDraw();
// set the new filter for calculations
this.fil = fil;
}
