public static void RubberBandStretcher_SetExpectedInputDuration(IntPtr rbs, IntPtr samples)
 {
     if (IntPtr.Size == 8)
     {
         RubberBandNativeMethodsx64.RubberBandStretcher_SetExpectedInputDuration(rbs, samples);
     }
     else
     {
         RubberBandNativeMethodsWin32.RubberBandStretcher_SetExpectedInputDuration(rbs, samples);
     }
 }