Music is a great thing to have on your page. It can really help to make it come to life. The code is simple - I still don't have it memorized though ^^' I just copy and past everytime I need it. But it's still simple. Go here if you don't know the code.
Embed it Please
The invisible music box can be a very frustrating thing. First of all there is the fact that you CAN'T STOP THE MUSIC. It just keeps going and going and going and the only way I can stop it is to shut off my speakers. All you need to do is embed the control box (the code above automatically embeds it) it's so simple and saves much sanity. The second point is that there is no way viewers can save a midi that they like. It's just no fun to fall in love with a midi file and then be denied the right to download it.
If you don't want the control box to take away from your page layout, just put some extra space at the bottom of your page and place it out of sight, and out of mind.