text: #ifndef AUDIOHANDLER_H
  
  typedef void (*AudioHandlerFunction)(void*, double*, double*);
  
  typedef struct AudioHandler_struct {
      AudioHandlerFunction function;
      void* parent_object;
  } AudioHandler;
  
  AudioHandler* AudioHandler_new(AudioHandlerFunction function, void* parent_object);
  void AudioHandler_delete(void* audio_handler_void);
  
  #endif