Fruit Machine Chat

Noticed something on this, when your on the board you seem to get one of two sound effects.. Seems very weird.. Anyone else had this?

This happens on most of these (if not all?). Not heard some so i don't know, but Warped/Monster Cash/ Poker Face definitely have 2 lots of board music. I did think at one point it meant that if you heard one it meant it had juice in it, but i'm not really sure. Maybe it's just co-incidental, but if they are dead you only ever hear one!