public static float RubberBandStretcher_GetFrequencyCutoff(IntPtr rbs, int n)
 {
     if (IntPtr.Size == 8)
     {
         return(RubberBandNativeMethodsx64.RubberBandStretcher_GetFrequencyCutoff(rbs, n));
     }
     else
     {
         return(RubberBandNativeMethodsWin32.RubberBandStretcher_GetFrequencyCutoff(rbs, n));
     }
 }