_play = (url, index) => {
    this._getData(url);
    this.source.start(index)
}

_getData(url) {
    this.source = this.audioContext.createBufferSource();
    var request = new XMLHttpRequest();

    request.open('GET', url, true);

    request.responseType = 'arraybuffer';


    request.onload = () => {
        var audioData = request.response;
        console.log(this.audioContext)
        this.audioContext.decodeAudioData(audioData, buffer => {
        this.source.buffer = buffer;
        this.source.connect(this.audioContext.destination);
    },

        function(e){ console.log("Error with decoding audio data" + e.err); });

    }

    request.send();
}

this.audioContext = new (window.AudioContext || window.webkitAudioContext)();