How to add music or song in my profile?

I can't find a link where to add music either but, yea, I've seen profiles with music and the only guess that's closer to the answer to your question is this. Music are the comments added by friends. They are like "embedded" files that you can get from other sites they are in like html code or something. YOu copy it and paste in the comment then when you reload there goes the music. So technically, you can't do this on your own. Your friend has to send you the file in the comment boxes. Let me know if I am wrong. and if you have figured out please let me know too. Thanks.