hello...
you could easily modify my code to do 3 effects, but i assume then that you'd have to have all 3 effects playing at the same time, unless they were triggered to play by clicking somewhere. still doable, though...
the audio tag will not work in any older ie version, so you will be stuck there. you might want to consider a player like this:
http://www.jplayer.org/
that you can control volume on via javascript - that is the key thing you need, which the html5 audio element does allow...but you won't get full support with it...
sitruc