HTML5 support this element by default. In this case, we uploaded our mp3 file via CloudApp and used the absolute link they share. We have a post regarding tools to share any kind of files. Just replace the URL.

Snippet

<audio controls style="width: 100%">
<source src="https://d2aztkdj0ezvrk.cloudfront.net/items/0r2I3q272i1r3N1G2n31/GNU%20GPL%20by%20Seth%20Godin.mp3" type="audio/mpeg">
</audio>

Result