Xenogears IS NTSC, you must run it at 60FPS... it should fix your issue
btw, if you're playing the US version, there's lag between sound and video in most MDECs, it's not an emu problem... that's just they way the game runs on a real PSX
btw, if you're playing the US version, there's lag between sound and video in most MDECs, it's not an emu problem... that's just they way the game runs on a real PSX