Yeah. Create a new HTML file, and call it something like mp3download.html. Then in the page you want the link to appear in, use this code:
<a href="mp3download.html" title="Download">Download the mp3</a>
Then, in mp3download.html, use this meta tag:
<meta http-equiv="Content-Disposition" content="attachment;filename=mySong.mp3" />
You can add other content in your mp3download.html file, but that meta tag will force download.