BU>    /*
BU>    **   Do simultaneous data copy and bit-reversal ordering into outputs...
BU>    */

BU>    for ( i=0; i < NumSamples; i++ )
BU>    {
BU>        j = ReverseBits ( i, NumBits );
BU>        RealOut[j] = RealIn[i];
BU>        ImagOut[j] = (ImagIn == NULL) ? 0.0 : ImagIn[i];
BU>    }

BU>    /*
BU>    **   Do the FFT itself...
BU>    */
BU>