I’m really sorry to ask this question, but it’s an urgency. Simply , i just want that my sound change according to my variable “Terro”. When my variable is false , it’s work my “Ambiance” music is play and my “Angoisse” music is stop, but when my variable is true , it doesn’t work , like my variab…

Hello It is because you are using the EventBegin play. It means that will happens once, when the game starts and no more! Use event tick instead, it will update every frame. Regards,