preloadjs读取audioSprite的json文件问题

//index.js

    var loadQueue = new createjs.LoadQueue();

    loadQueue.installPlugin(createjs.Sound);

    loadQueue.loadManifest('sound.json');

    loadQueue.on('complete',function(){

        var keyboard = createjs.Sound.createInstance('keyboard');

        keyboard.play();

    });

//sound.json

{

  "src": "./src/music/sound.mp3",

  "data": {

    "audioSprite": [

      {

        "id": "keyboard",

        "startTime": 0,

        "duration": 215.98639455782313

      },

      {

        "id": "eletric",

        "startTime": 2000,

        "duration": 1044.8979591836735

      }

    ]

  }

}