title: Saving an audio MediaStream into a file
body: <p>I am receiving audio in a browser from WebRTC as a MediaStream. I need to convert it to an audio file, preferably an ogg. Ideally, the audio file will be uploaded to the server, but downloading it to the client as a file is the second best option.</p>
  <p>I've learned how to upload audio in blobs, so if there is a way to save it to a Blob first, that should be good enough.</p>