Set to "Off". Because the game is entirely animated video, frame skipping can cause audio de-syncing.
Before diving into the patch, it is important to understand why fans seek out the PSP ISO specifically. school days psp iso english patch top
Connect your console to your computer. Copy the modified ISO file into the ISO folder on your memory stick (or via Adrenaline on PS Vita). Top Gameplay Tips for Surviving School Days Set to "Off"