title: m4a file receives no status code when loading on iPad (HTTPS)
body: <p>I am trying to use HTML5 audio across devices and have managed to get it to work on desktop machines by using the following code:</p>
  
  <pre><code>&lt;audio id="audio-1" preload="auto" &gt;
      &lt;source src="~/Assets/audio/file1.m4a" type="audio/mpeg"&gt;
      &lt;source src="~/Assets/audio/file1.ogg" type="audio/ogg"&gt;
  &lt;/audio&gt;
  
  &lt;audio id="audio-2"  preload="auto"&gt;
      &lt;source src="~/Assets/audio/file2.m4a" type="audio/mpeg"&gt;
      &lt;source src="~/Assets/audio/file2.ogg" type="audio/ogg"&gt;
  &lt;/audio&gt;
  
  &lt;audio id="audio-3" preload="auto"&gt;
      &lt;source src="~/Assets/audio/file3.m4a" type="audio/mpeg"&gt;
      &lt;source src="~/Assets/audio/file3.ogg" type="audio/ogg"&gt;
  &lt;/audio&gt;
  </code></pre>
  
  <p>However on devices (both Android 5.1.1 and iOS 9) the sounds don't play.</p>
  
  <p>When debugging the iPad I noticed that GET requests were sent for all the audio files but no status code was returned. </p>
  
  <p><a href="https://i.stack.imgur.com/FVKec.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FVKec.jpg" alt="iPad Safari debug screen"></a>
  I have read an article from IBM about a combination of AAC and OGG are the best source of cross browser compatibility: <a href="http://www.ibm.com/developerworks/library/wa-ioshtml5/#resources" rel="nofollow noreferrer">http://www.ibm.com/developerworks/library/wa-ioshtml5/#resources</a> so I'm hopeful that it isn't the file types causing the issue.</p>
  
  <p>I've also read that there are possible issues with files being served up over HTTPS on devices.</p>
  
  <p>What I don't know is if there is a work around to get these files to play on devices? (They are triggered on events using native HTML5 audio methods in JS)</p>