response to sound effects and Foley article

In movies, most sounds are recorded or added in after filming. There are three categories of sound effects added in during the editing of a film. Ambience sound effects are background sound effects or noises that can be recorded on location before or after filming a scene. Library effects are prerecorded sounds, not made for any particular visuals, that can be bought from a website. Foley sound effects are performed and recorded for a specific scene. These include footsteps, sounds made by cloth, and sounds of/from props. The process of watching the film and then adding sounds that correspond to the visuals came from a Universal employee named Jack Foley, hence why it's called Foley.

This is cool! Although most likely a very tedious process, the idea of filming something entirely without audio or dialogue and then recording all these sounds in real time to go along with the visuals seems very cool. Granted that would be near impossible to do with explosion sounds and gunfire, which is why it's better to get library effects and not even attempt to record that. I was surprised to see that movies's sounds were done this way. I thought it was mostly recorded along with the visuals and few things were thrown in later, not the other way around.