Retrieve file column to HTML5 audio player

webapi.safeAjax({
    type: "GET",
    url: "/_api/musdyn_tracks({{ request.params.id }})/musdyn_audiotrack",
    contentType:"application/json",
    success: function(res) {
        console.log(res);
        $('#main').append('<audio controls><source src="data:audio/mp3;base64,' + res.value + '" type="audio/mpeg">Your browser does not support the audio element.</audio>');
    },
    error: function(xhr, status, error){
        var errorMessage = xhr.status + ': ' + xhr.statusText;
        console.log(errorMessage);
    }
});