text: /*---------------------------------------------------------------------------
  //
  //                                3 Band EQ :)
  //
  // EQ.H - Header file for 3 band EQ
  //
  // (c) Neil C / Etanza Systems / 2K6
  //
  // Shouts / Loves / Moans = etanza at lycos dot co dot uk 
  //
  // This work is hereby placed in the public domain for all purposes, including
  // use in commercial applications.
  //
  // The author assumes NO RESPONSIBILITY for any problems caused by the use of
  // this software.
  //
  //----------------------------------------------------------------------------*/
  
  #ifndef __EQ3BAND__
  #define __EQ3BAND__
  
  /* ------------
  //| Structures |
  // ------------*/
  
  typedef struct {
      /* Filter #1 (Low band) */
  
      double lf;      /* Frequency */
      double f1p0;      /* Poles ... */
      double f1p1;
      double f1p2;
      double f1p3;
  
      /* Filter #2 (High band) */
  
      double hf;      /* Frequency */
      double f2p0;      /* Poles ... */
      double f2p1;
      double f2p2;
      double f2p3;
  
      /* Sample history buffer */
  
      double sdm1;      /* Sample data minus 1 */
      double sdm2;      /*                   2 */
      double sdm3;      /*                   3 */
  
      /* Gain Controls */
  
      double lg;      /* low  gain */
      double mg;      /* mid  gain */
      double hg;      /* high gain */
  
  } EQSTATE;
  
  
  /* ---------
  //| Exports |
  // ---------*/
  
  extern void init_3band_state(EQSTATE * es, int lowfreq, int highfreq,
             int mixfreq);
  extern double do_3band(EQSTATE * es, int sample);
  
  
  #endif        /* #ifndef __EQ3BAND__ */
  