title: Which mime type should I use for mp3
body: <p>I'm trying to decide which mime type to choose for returning mp3 data (served up by php)</p>
  
  <p>according to this listing of mime types: <a href="http://www.webmaster-toolkit.com/mime-types.shtml" rel="noreferrer">http://www.webmaster-toolkit.com/mime-types.shtml</a></p>
  
  <pre><code>.mp3    audio/mpeg3
  .mp3    audio/x-mpeg-3
  .mp3    video/mpeg
  .mp3    video/x-mpeg
  </code></pre>
  
  <p>What are the difference between these, and which should I use?</p>