Low fps on Tales of Symphonia?

[roughwinds]

I've messed quite a bit with the settings and just can't figure out what's causing this, the fps is fluctuating a lot between 35~50 with some more drastic drops to low 20s even at native resolution. Changing the DSP Emulator Engine to LLE recompiler oddly seems to do the biggest performance hit, making the game run at sub 20. Other than Symphonia I've also tested Twilight Princess and Wind Waker and both are working just fine with stable fps. Any suggestions?