PLANE is 2km away from players
PLANE say "Plane_Fighter_01_ejection_ext_sound";
PLANE say ["Plane_Fighter_01_ejection_ext_sound",400];
PLANE say2d "Plane_Fighter_01_ejection_ext_sound";
PLANE say2d ["Plane_Fighter_01_ejection_ext_sound",400];
In any case of execution of these commands the sound will be heard by all players in the world: player camera (1st or 3rd person view), Spledid Camera, Zeus interface. BUT — If player camera (1st or 3rd POV) exec say command will work as expected. (in 3D, like we use say3d)
Watch this video showcase all the above cases → https://www.youtube.com/watch?v=j_dsa9SG1ns