Play Audio From File Pack

var config = {
    type: Phaser.AUTO,
    parent: 'phaser-example',
    width: 800,
    height: 600,
    pixelArt: true,
    scene: {
        preload: preload,
        create: create
    }
};

var game = new Phaser.Game(config);

function preload ()
{
        this.load.setBaseURL('https://cdn.phaserfiles.com/v355');
    this.load.pack('pack1', FilePackObject);
}

function create ()
{
    this.add.image(400, 300, 'wizball').setScale(4);

    var music = this.sound.add('theme');

    music.play();
}

var FilePackObject = {
    "pack": {
        "files": [
            {
                "type": "audio",
                "key": "theme",
                "url": [
                    "assets/audio/oedipus_wizball_highscore.ogg",
                    "assets/audio/oedipus_wizball_highscore.mp3"
                ]
            },
            {
                "type": "image",
                "key": "wizball",
                "url": "assets/sprites/wizball.png"
            }
        ]
    },
    "meta": {
        "generated": "1401380327373",
        "app": "Phaser 3 Asset Packer",
        "url": "https://phaser.io",
        "version": "1.0",
        "copyright": "Photon Storm Ltd. 2021"
    }
};