code: function(id) {
  			if (!Crafty.support.audio)
  				return;
  			var s;
  			if (!id) {
  				for (var i in this.sounds) {
  					s = this.sounds[i];
  					if (!s.obj.paused)
  						s.obj.pause();
  				}
  			}
  			if (!this.sounds[id])
  				return;
  			s = this.sounds[id];
  			if (!s.obj.paused)
  				s.obj.pause();
  		}
docs: @
  #Crafty.audio.stop
  @sign public this Crafty.audio.stop([Number ID])
  
  Stops any playing sound. if id is not set, stop all sounds which are playing
  
  @example
  ~~~
  //all sounds stopped playing now
  Crafty.audio.stop();
  
  ~~~