Hi, I'm new here, and new to PSX emulation, and I've been meaning to play the legendary Castlevania: Symphony of the Night for quite some time. I've downloaded the English-patched Japanese ISO (Akumajou Dracula X: Gekka no Yasoukyoku, or "Devil's Castle Dracula X: Nocturne in the Moonlight" for those who don't know Japanese) because I'm more used to Japanese games having Japanese voice acting, and have tried to play it in the past with ePSXe (can't remember the version number), but I got stuttering/choppy audio and some slowdown. How do I run the game without issues?

My computer is a Lenovo 7760 IdeaCentre B320 with 6 GB RAM, if that helps.