Hai ragione, rimedio subito:
il player è "singlemp3player.swf" scaricato proprio qui, da HTML.it
il codice:

<HEAD>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="jquery.jmp3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".sound").jmp3({
backcolor: "000000",
forecolor: "ffffff",
width: 26,
showdownload: "false",
showfilename: "false",
repeat: "true",
volume: "80",
autoplay: "true"
});
});
</script>
</HEAD>

<BODY>
<p class="sound">musica.mp3</p>
</BODY>