text: Object.assign(pc, function () {
      var _schema = ['enabled'];
  
      /**
       * @class
       * @name pc.AudioListenerComponentSystem
       * @augments pc.ComponentSystem
       * @classdesc Component System for adding and removing {@link pc.AudioComponent} objects to Entities.
       * @description Create a new AudioListenerComponentSystem.
       * @param {pc.Application} app - The application managing this system.
       * @param {pc.SoundManager} manager - A sound manager instance.
       */
      var AudioListenerComponentSystem = function (app, manager) {
          pc.ComponentSystem.call(this, app);
  
          this.id = "audiolistener";
          this.description = "Specifies the location of the listener for 3D audio playback.";
  
          this.ComponentType = pc.AudioListenerComponent;
          this.DataType = pc.AudioListenerComponentData;
  
          this.schema = _schema;
  
          this.manager = manager;
          this.current = null;
  
          pc.ComponentSystem.bind('update', this.onUpdate, this);
      };
      AudioListenerComponentSystem.prototype = Object.create(pc.ComponentSystem.prototype);
      AudioListenerComponentSystem.prototype.constructor = AudioListenerComponentSystem;
  
      pc.Component._buildAccessors(pc.AudioListenerComponent.prototype, _schema);
  
      Object.assign(AudioListenerComponentSystem.prototype, {
          initializeComponentData: function (component, data, properties) {
              properties = ['enabled'];
  
              pc.ComponentSystem.prototype.initializeComponentData.call(this, component, data, properties);
          },
  
          onUpdate: function (dt) {
              if (this.current) {
                  var position = this.current.getPosition();
                  this.manager.listener.setPosition(position);
  
                  var wtm = this.current.getWorldTransform();
                  this.manager.listener.setOrientation(wtm);
              }
          }
      });
  
      return {
          AudioListenerComponentSystem: AudioListenerComponentSystem
      };
  }());
  