Sound #11590 (possibly named "Simon Game Button Red Sml") doesn't exist. It may have been removed from the game.
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Simon Game - Button, Red, sml - Live
Simon Game - Button, Red, sml - PTR
Simon Game - Button, Red, sml - PTR 2
Simon Game - Button, Red, sml - Beta
Simon Game - Button, Red, sml - Burning Crusade
Simon Game - Button, Red, sml - Wrath of the Lich King
Simon Game - Button, Red, sml - Cataclysm