you will have to have a hit event in either the ball or the player character. then you will have to have a condition that checks the class of the other. then spawn sound.
below is an example of what im talking about. in the picture you will see i have a hit event for the ball, then i use the equal (==) operand on the other actor pin (which returns the actor that hit the ball). if the other actor is equal to the player character (branch node asks this) then we spawn the sound at the balls location.
