Dannthr (Dannthr#0899) answered it on discord 
Thx ^^
“To access Source Effects, you need to turn on the Unreal Audio Engine New Audio Engine: Quick-Start Guide - Audio - Unreal Engine Forums”
Dannthr (Dannthr#0899) answered it on discord Thx ^^
“To access Source Effects, you need to turn on the Unreal Audio Engine New Audio Engine: Quick-Start Guide - Audio - Unreal Engine Forums”