title: Adding an AudioTrack while the MediaRecorder is in state 'recording'
body: <p>Im trying to add mediaTrack to the mediaStream while MediaRecorder is in state 'recording'</p>
  <p>The code for adding a new track is the following:</p>
  <pre><code>activeStream.addTrack(newAudioTrack)
  </code></pre>
  <p>After that the event (onstop) was triggered. How can I avoid this?</p>