I've read the first post, and it seems the way you've programmed this is similar to how I programmed Roses and Wine. I.e., you've cheated ? You look for a mem var change and then play the effect that matches.
But with a dll it should be possible to make a full and proper replacement of the sound. We can write our own code and disable the game version, thus emulating all the functions of akao correctly.
Do you have any desire to do this? Because I might at some point. I think it's time FF7 had the original sound effect quality. At the least, the battle sound effects. Does Ultrasound work this way for ordinary battle effects?
I suppose with battle effects there wouldn't be any real need to do it differently to the cheating way, since there won't be any fading or other effects.