text: 
  #ifndef GXCHANNEL_H
  #define GXCHANNEL_H
  
  class gxChannel {
  
  	/***** GX INTERFACE *****/
  public:
  	virtual ~gxChannel();
  	//modifiers
  	virtual void stop() = 0;
  	virtual void setLooping(bool looping) = 0;
  	virtual void setPaused(bool paused) = 0;
  	virtual void setPitch(int pitch) = 0;
  	virtual void setVolume(float volume) = 0;
  	virtual void setPan(float pan) = 0;
  	virtual void set3d(const float pos[3], const float vel[3]) = 0;
  	virtual void set3dOptions(float roll, float dopp, float dist) = 0;
  
  	virtual bool isPlaying() = 0;
  };
  
  #endif