title: Twilio: programmatically join conference and play <Say> command or <Play> sound file?
body: <p>I have two users and I joined them both into a <code>&lt;Conference&gt;</code>.</p>
  
  <p>I would like to have a robot join the <code>&lt;Conference&gt;</code> and then make an announcement.</p>
  
  <p>There are two approaches I'm considering:</p>
  
  <ol>
  <li><p>Take everyone in the conference, redirect them to a TwiML that plays a sound, and then move them back into the Conference.  </p></li>
  <li><p>Create a bot that somehow joins the Conference and plays TwiML, but it's not clear for me, from the documentation, how to do that.</p></li>
  </ol>