[quote:1nnl604y]Hi so I want to make a sound pop up when a layer comes visible.
That was your problem. My setup solved this problem. Have you at least tried it out?
The layer "hint" becomes visible when hitting the collision object - a sound is played once. You can replace the condition on collision with object with what ever you want. The counter is just for making the layer invisible again so the procedure can be repeated. You can also replace this mechanic with whatever you want.