oh sorry guys, here goes more detailed info.
i'm playing on epsxe 1.6 cuz 1.7 gave me some cd switching problems. my pc specs are:
Intel Quad CPU Q6600 @2.40 Ghz
3,25 GB Ram
ati radeon 4800 series
Asus PQ5 Motherboard with integrated Realtek Sound
Plugins are: Sapu CDR, Pete's Open GL2 with Natural Vision Shader, Eternal Spu for sound. all latest releases.
the slowdown started spontaneously. i don't remember switching plugins or anything and i've been playing off cd image files, not game cds. in ff 9, the parts where i experience the worse slowdown is, oddly enough, in the in-game menus (save, items, abilities, etc). it also slows down a bit when i'm casting spells in battles, like blizzara and fira. i can't really tell if the problem is sound or graphics related