Audio

ADR – automatic dialogue replacement when you change the audio after post production. ADR is the process of replacing the audio after it is shot on set, the actor may replace a talking to censor or replace with singing it can also be used for creative proposes. Before the movies try’d making different movies before dubbing it is not uncommon to completely replace all audio partial ADR is not recommended

Visual ADR is when the actor watches the scene and replaces the dialogue. Auditory ADR is when the actor listens and repeats this is used for musicals rather than regular scenes

Foley sound – it’s very common of using the sounds can be used from anywhere but it isn’t the original sound it is an imitation often using props to mimic sounds

Music – its not just a popular piece it is usually an underscore. Should be royalty free. Sound bridging is when audio bridges two clips using layers to smooth transitions. Then you have to mix all the sound first is the ambient or background then Foley and dialogue and finally music after you mix the volume