title: how can I use html5 <audio> tag to play aac file?
body: <pre><code>&lt;audio controls&gt;
    &lt;source src="xxx.aac" type="audio/aac"&gt;
  &lt;/audio&gt;
  </code></pre>
  
  <p>I can get it to work in safari but doesn't work in chrome and firefox. any solution?</p>