Hello I have a problem on my sounds, when I play them they overlap and I don’t know how to avoid this problem… I don’t know if the Meta-sound will be useful to me or not… someone will be how I can I do so that it no longer overlaps? Knowing that I activate them when my turrets fire their projectiles… and that I can have several turrets next to each other
Could you post a screen shot of your metasound? Possibly might be pertinent to see the BP interactions to trigger it.
Yeah sorry 
This is the meta sound and when i activate the meta sound, just for info, the tower shoot after a light effect touch her and the speed of the light effect varies according to a parameter that is chosen in the menu, but whatever the parameter chosen, the speed of the light effect makes the sound always superimposed even at least fast
I am not sure from your description what your intended result is, but your metasound (presumably automatically played in the audio component) receives a trigger of caisse_claire on overlapping, plays the sound and then on the next 2 triggers, does not play a sound, then on the 4th trigger once again plays a sound, and so on. So for every three Execute Trigger calls (of Input caisse_claire), it plays one sound. This would mean that a sound would be played for every 3rd Projectile Type 2 you spawn.
Is that what you intend?
If you wanted a sound to play for every spawn of BP Projectile Type 2, you could remove the Trigger Counter and Trigger Compare.
Edit: After posting, it occurred to me why you had so many disconnected Trigger Compares and Players. If you want it to fire on every spawn, the second two trigger compares need to be connected.