code: function load(mapping) {
          angular.forEach(mapping, function(v, k) {audio[k] = new Audio(v);});
      }
docs: @ngdoc method
  @name load
  @methodOf coa.audio.service:player
  @param {Object} mapping An object with sound names as keys and paths to the sound files as values.
  @description
  
  Load sound files.