Add yahoo media player to blogger

Step 1: Go to dashboard --> then click on Template --> then Edit HTML --> Search

</head> and paste code from below box exactly before </head>

 <script type="text/javascript" src="http://webplayer.yahooapis.com/player.js"></script> 

Step 2:  Insert your MP3 file URL and name and past code 

<a href="Your-mp3-file-URL">Name-Of-the-Mp3-File</a>