Simply go to the index_body template of your site and place this at the top.

Code:
<!-- Wikplayer http://www.wikplayer.com -->
<script type="text/javascript" src="http://www.wikplayer.com/code.js" 
data-config="{'skin':'skins/wikfull/funkyDeepOcean/skin.css','volume':50,'autoplay':true,'shuffle':false,'repeat':0,'showcomment':false,'marqueetexton':true,'placement':'top','showplaylist':false,'playlist':[{'title':'Name Of Song','url':'You URL'}]}" ></script>
<!-- Wikplayer code end -->