title: Record tablet's screen AND audio
body: <p>I've been wondering, after trying this command on my Nexus 7:</p>
  
  <pre><code>adb shell screenrecord /sdcard/demo.mp4
  </code></pre>
  
  <p>Is there a way to record the screen AND audio of the tablet using the factory <code>screenrecord</code> command? Checking the <a href="http://developer.android.com/tools/help/adb.html#screenrecord">Android documentation</a>, it says nothing about recording the audio too, but we all know the Android documentation is not <em>that</em> complete</p>