Demon's Souls [BLUS30443] Game and audio stutter when dismissing some menus

Try making a custom config for the game. Save it. Go into the config folder => custom configs. Open it with notepad. Right there at the very top will say PPU threads: 2. Change that to a 1, and see if that fixes your audio issue. I had this issue in a couple games, and PPU threads: 1 fixed the issue in each and every case. This is the general fix I do for games that have audio issues and micro stuttering. Worth a shot at least.