I feel a bit stupid for basically being the only one posting here, but what the hell.
I thought it should be easy to implement something that would play a sound every time a collision is detected between two objects, but I’m only able to get the sound the first time the collision is detected (collision between one object and another which is duplicated several times in the scene.
I’ve tried something like this:
[attachment=0]sound.png[/attachment]
Edit: Never mind, it looks like it worked fine when I deleted the instance of the object upon coliision.