generating dummy text file

extras/wav2sketch/wav2sketch.html

     <p>Upload an audio file to convert it into Teensy audio format.</p>
     <form>
       <input id="audioFileChooser" name="audioFileChooser" type="file" accept="audio/*">
+      <div id="outputFileHolder"></div>
     </form>
     <script type="text/javascript" src="wav2sketch.js"></script>
   </body>

extras/wav2sketch/wav2sketch.js

   	source.connect(context.destination);
   	source.start(0); 
 	});
-}
+}
+
+function generateOutputFile(fileContents) {
+  var textFileURL = null;
+  var blob = new Blob([fileContents], {type: 'text/plain'});
+  textFileURL = window.URL.createObjectURL(blob);
+  return textFileURL;
+}
+
+var outputFileHolder = document.getElementById('outputFileHolder');
+var downloadLink = document.createElement('a');
+downloadLink.setAttribute('download', 'test.txt');
+downloadLink.href = generateOutputFile("this is a test");
+downloadLink.innerHTML = 'download link';
+outputFileHolder.appendChild(downloadLink);