Quoted from dmacy:
I never have either. I don't think it works unless it's the attract sounds when you hit the flipper button "Hey! Let me out!" OR the attract sounds after your game is over and you get the " 2 minutes..." count down, etc.
I was just wondering about this last night when working on mine. I can hear it really faintly on mine, I thought there was some probably going on, but it seems it doesn't have a regular running attract sound beyond after you play a game or if you hit a button. Lame. I like a game that calls to you from across the room every once in a while.