Embedding midis is one of those tags caught in the browser wars. Netscape and IE do not read the same tag and IE just changed the way it reads tags. When I changed the background music to the above code I had a hundred messages saying they could no longer hear music. When I changed it back I had a hundred messages saying their new version of IE had an echo of each midi - now some AOL people can't hear music at all...

The best explanation of tags for coding background music is a short page here.

No matter what code you use you're bound to get several messages a day (or week) from someone saying they can't hear music...