I know why. (I realised it earlier today.) It does work, I just forgot to mention that this is for making it play when you select the sails setting in the actions menu, not when you quick-set it by pressing the forwards and backwards buttons. Sorry...
You can implement it for the quick-setting as well, I'm just not sure where the function for that lies. Possibly somewhere in "controls.c"?
Thanks, sadly i don't found where it could be or how it could be called. I will maybe just pass it. As for the Playsound3D i will use playstereosound instead and it will do the job