public static IntPtr RubberBandStretcher_Retrieve(IntPtr rbs, float[] output, IntPtr samples, int channels)
 {
     if (IntPtr.Size == 8)
     {
         return(RubberBandNativeMethodsx64.RubberBandStretcher_Retrieve(rbs, output, samples, channels));
     }
     else
     {
         return(RubberBandNativeMethodsWin32.RubberBandStretcher_Retrieve(rbs, output, samples, channels));
     }
 }