(Sound effect material library sound background post sound effects, including nearly 8500 kinds of sound effect materials, which can be used in PR and other video production, including more than 8500 kinds of sounds: explosion sound, shutter sound, multi person laughter, ocean wave sound, atmospheric opening music, opening bird cry, electric current sound, collision sound, gun sound, machine gun sound, light sound and so on!It is a dubbing effect in video production, which must not be an exact sound effect!)