1978 - "beep" "Beep" !! Ballys sounded better than SYS1 and SYS6. Sterns were woeful !

Sorry, I have to disagree
I prefer the sounds of the Gottlieb sys 1 better than the tinnie sound of the Bally's of the time
Bwoopp, bwoop, dooo, dooo

( I also prefer those beautiful big blue displays)