You need to know html... I'm sure Angelfire has a way to manually edit html documents-- I used to use their server. Most places do.
Where did you upload your files, angelfire's server or another?
If you can what is the exact path of the files? For example: my avatar is uploaded to a geocities server so I used the exact path:
http://www.geocities.com/agasfas/bansig.jpg
If I wanted to link it in html you would have to type:
<a href="http://www.geocities.com/agasfas/bansig.jpg">Click me</a>
It would look much like this:
Click Me
-though in your case it's an mp3 or another music format
If you know the exact path of the file (where it's uploaded), then you can use the code I mentioned anywhere. Just remember the linking tag:
<a href="http://.......">Click </a>
If you need more help, feel free to Pm me. I don't mind helping out.
Edit:
Yeah, can you post your website? I'm very experienced in HTML. If you let me or Zip (doesn't matter), we may be able to take a look at the Html source, edit it and send it back to you via PM. That's if you want to and still need the help.