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diff --git a/noatun/modules/winskin/vis/realFFT.h b/noatun/modules/winskin/vis/realFFT.h
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+/*
+  a FFT class
+  Copyright (C) 1998  Martin Vogt;Philip VanBaren
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation.
+
+  For more information look at the file COPYRIGHT in this package
+
+ */
+
+
+
+
+#ifndef __REALFFT_H
+#define __REALFFT_H
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+/**
+ <pre>
+ *     Program: REALFFTF.C
+ *      Author: Philip VanBaren
+ *        Date: 2 September 1993
+ *
+ * Description: These routines perform an FFT on real data.
+ *              On a 486/33 compiled using Borland C++ 3.1 with full
+ *              speed optimization and a small memory model, a 1024 point 
+ *              FFT takes about 16ms.
+ *              This code is for floating point data.
+ *
+ *  Note: Output is BIT-REVERSED! so you must use the BitReversed to
+ *        get legible output, (i.e. Real_i = buffer[ BitReversed[i] ]
+ *                                  Imag_i = buffer[ BitReversed[i]+1 ] )
+ *        Input is in normal order.
+ </pre>
+ */
+
+
+
+class RealFFT {
+
+  int* BitReversed;
+  short* SinTable;
+  int Points;
+
+ public:
+  RealFFT(int fftlen);
+  ~RealFFT();
+
+  void fft(short* buffer);
+  int* getBitReversed();
+
+ private:
+
+  short *A,*B;
+  short *sptr;
+  short *endptr1,*endptr2;
+  int *br1,*br2;
+  long HRplus,HRminus,HIplus,HIminus;
+
+
+};
+
+
+#endif