All sound effects are played via the Audio Source component attached to the character:FPS Player Sound component is used to play general sounds, not specific to any weapon. Other sounds, like reloads or firing, are played by the weapons - they access the character’s Audio Source and play the target sound effect.
Many sounds, like reloads, aiming, walking, or fire mode switching are played via animation events. Events are added directly to the Animation Clip and then are automatically triggered in runtime. There are 2 types of animation events.