Audio Shortcode (audio.html)
This shortcode allows you to play audio files via URL. This makes it easy without having to add manual HTML audio tag. When using this shortcode, use the < and > signs.
source(string) required: The path or URL to the file you want to play.unsupported(string) optional: The text to display if the file cannot be loaded, either do to error or the file does not exist or even the browser does not support playing files.