[Solved]Playing sound after exiting letter

[Omenapuu]

Hello! So basically I want to play this sound after the player closes the letter after opening and reading it. Right now it plays immediately after opening it, since it's set to do so when the player interacts with the letter. I don't see a smart way of using timers here, since people have different reading speeds etc.

ATTENTION: I noticed that it plays after closing when using the "PlaySoundAtEntity" instead of "PlayGuiSound". The problem here is that the sound plays too quietly which is why I would like to use "PlayGuiSound".