JSRS4 APEX for Arma 3 by JSRS Studios, is a sound modification for ArmA3. The purpose of this modification is to bring new sounds to the game, making it more exciting. Adding over 1000 new sounds to the game, JSRS4 APEX replaces default sound files of Arma 3 and does not require CBA (Community Bases Addons) to be installed.
To install the JSRS4 APEX you should use modfolders to keep it seperate from the official game content to prevent issues.
With Arma 3 you can use different ways to set up your modfolders to use custom content you have downloaded.