<figure {{ with .Get "class" }}class="{{ . }}"{{ end }}>
  <audio controls preload="{{ .Get "preload" | default "metadata" }}">
    <source src="{{ .Get "src" | relURL }}" type="audio/mpeg">
    Your browser does not support the audio element.
  </audio>
  {{ with .Get "caption" }}
    <figcaption>{{ . }}</figcaption>
  {{ end }}
</figure>
