function saveSound(soundFile, fileName) {
  var dataView = convertToWav(soundFile.buffer);
  p5.prototype.writeFile([dataView], fileName, 'wav');
}
Save a p5.SoundFile as a .wav file. The browser will prompt the user
to download the file to their device.
For uploading audio to a server, use
<a href="/docs/reference/#/p5.SoundFile/saveBlob">`p5.SoundFile.saveBlob`</a>.

 @for p5
 @method saveSound
 @param  {p5.SoundFile} soundFile p5.SoundFile that you wish to save
 @param  {String} fileName      name of the resulting .wav file.