I went ahead and removed the txt config, extra widescreen code in the lua, and used Jak v2 like you suggested. I definitely noticed better performance right away, but couldn't stomach the stretched 4:3 aspect ratio, so I manually applied the widescreen pnach to the iso and tried again. I was excited at first because the menus no longer had any slowdown or audio stutter, but once I got in the game, it became apparent there were still problems. So for now, I'm using your recommended settings with forced 4:3 aspect ratio, which maybe the best I can expect on the base model PS4. Thanks for your help.