data.append("data", reader.result);

  Recorder.setupDownload = function(blob, filename){
    var url = (window.URL || window.webkitURL).createObjectURL(blob);
    var link = document.getElementById("save");
    link.href = url;
    link.download = filename || 'output.wav';

     var reader = new window.FileReader();
       reader.readAsDataURL(blob);
       reader.onloadend = function() {
               base64data = reader.result;
               //console.log(base64data);

            var data = new FormData();
            data.append("data", base64data);
            var xhr = (window.XMLHttpRequest) ? new XMLHttpRequest() : new activeXObject("Microsoft.XMLHTTP");
            xhr.open( 'post', '/save.php', true );
            xhr.send(data);
                                         }
  }

  window.Recorder = Recorder;

})(window);