getting AudioPlayer to play a specific track requested by the user

Hi – I'm trying to enhance the Audio Player Sample Project so users can ask for a specific track by name. I understand conceptually how to do it, but I'm new to development and my Javascript chops are pretty limited...

I created a PlaySpecificAudio intent in my interaction model with a custom slot type Item with all my track names as the custom slot values of Item. Sample utterances include: listen to {Item}, to play {Item}, I want to hear {Item}, etc.

But on the Lambda side, I'm struggling to configure my new intent to feed into the AudioPlayer.

I think I'm close, but can't figure out exactly how to map the title and url of the specified audio Item into the subsequent player code.

Here's my broken code as-is:

'PlaySpecificAudio' : function () {
            var itemSlot = this.event.request.intent.slots.Item;
            var itemName;
            if (itemSlot && itemSlot.value) {
                itemName = itemSlot.value.toLowerCase();
                }
            var songs = audioData.title;
            var song = songs[itemName];
	    var songURL = song;

            if (song) {if (!this.attributes['playOrder']) {
                // Initialize Attributes if undefined.
               this.attributes['playOrder'] = Array.apply(null, {length: audioData.length}).map(Number.call, Number);
                this.attributes['index'] = 0;
                this.attributes['offsetInMilliseconds'] = 0;
                this.attributes['loop'] = true;
                this.attributes['shuffle'] = true;
                this.attributes['playbackIndexChanged'] = true;
                //  Change state to START_MODE
                this.handler.state = constants.states.START_MODE;
                }}
                controller.play.call(this);
            },

Here's the format of audioData:

var audioData = [
    {
        'title' : 'song one',
        'url' : 'https://s3.amazonaws.com/.......'
    },
    {
        'title' : 'song two',
        'url' : 'https://s3.amazonaws.com/.......'
    }
];

And here's the functioning PlayAudio intent from the tutorial for reference (within stateHandlers.js):

'PlayAudio' : function () {
      if (!this.attributes['playOrder']) {
          // Initialize Attributes if undefined.
          this.attributes['playOrder'] = Array.apply(null, {length: audioData.length}).map(Number.call, Number);
          this.attributes['index'] = 0;
          this.attributes['offsetInMilliseconds'] = 0;
          this.attributes['loop'] = true;
          this.attributes['shuffle'] = false;
          this.attributes['playbackIndexChanged'] = true;
          //  Change state to START_MODE
          this.handler.state = constants.states.START_MODE;
      }
      controller.play.call(this);
  },

I'm thinking PlaySpecificAudio just needs a few tweaks. Any guidance would be much appreciated. THANK YOU!

Audio Player Sample Project on Github

https://github.com/alexa/skill-sample-nodejs-audio-player/tree/mainline/multiple-streams