Audio Open Graph Meta Tags

In a similar fashion to og:video you can add an audio file to your markup:

og:audio - e.g., "http://example.com/amazing.mp3"

and optionally

og:audio:title - e.g. "Amazing Soft Rock Ballad"
og:audio:artist - e.g. "Amazing Band"
og:audio:album - e.g. "Amazing Album"
og:audio:type - e.g. "application/mp3"

For example:

<html xmlns:og="http://ogp.me/ns#">
    <head>
        ...
        [REQUIRED TAGS]
        <meta property="og:audio" content="http://example.com/awesome.mp3" />
        <meta property="og:audio:title" content="Awesome Song" />
        <meta property="og:audio:artist" content="Awesome Band" />
        <meta property="og:audio:album" content="Totally Awesome Album" />
        <meta property="og:audio:type" content="application/mp3" />
        ...
  </head>