A post on my Clok mod topic brought my attention to make another topic about this one. Someone, including me, posted soundpacks for squaresoft back then when there was no permanant global world customization. There is now, and I guarantee 100% that it works. All you have to do is open up mushclient.exe and play.
Note that this is a professional pack, not anything wonky like me. I'm borrowing the base pack from this one to enhance my Clok mod now as well. Alrighty, go give it a try!
Note: if you want more information whether there's any soundpack changes and update, type finger Yukiko within the game to find out. I don't own this soundpack. I just help with it a little here and there.
Thank you, and enjoy!