text: function ExportAudio(props, exportOptions) {
      var audio = props.property("Audio");
      var level = audio.property("Audio Levels");
      var data  = {
          value: {
              source: getRelativeFilePath( props.source.mainSource.file.toString() ),
              volume: level.value[0],
              audioEnabled: props.hasAudio ? props.audioEnabled : false
          }
          // "start"   : props.inPoint,
          // "duration": props.outPoint - props.inPoint
      };
      if(level.isTimeVarying) {
          data.value.volume = level.keyValue(1)[0];
          data.timeline = exportProps( audio, ["Audio Levels"], ["volume"], exportOptions );
          var timeline  = [];
          var i, total  = data.timeline.length;
          for(i = 0; i < total; ++i) {
              var key = data.timeline[i];
              if(key.name === "volumeX") {
                  key.name = "volume";
                  timeline.push(key);
              }
          }
          data.timeline = timeline;
      }
      return data;
  };
  