The cubes have no clue what is going on, and should stay this way. It’s the player that is the instigator here - I think it would be better if the player held onto the reference and was driving the logic.
- in the cube actors:
Work in the DoOnce here if needed and handle the sound.
- in the player who has a small sphere overlap they can touch the cubes with:
The sound will play in the cube we just touched and stop in the one we touched before; there can be any number of cubes and they do not know about each other’s existence - avoid creating hard references if you can.
I hope I got it right.