Sound design

 The definition of  Sound design is the process of specifying, acquiring, manipulating or generating audio things. It is used in filmmaking, television production, theatre, sound recording and reproduction, live performance, sound art, post-production, and video game software. Sound design most commonly involves the manipulation of previously composed or recorded audio, such as sound effects and dialogue. it is also used to create a particular effect or mood. A sound designer is the person who practices the art of sound design. In film you may have more than one sound designer working on one movie, this is to create perfect sound design as one person may thing things a perfect, however if there is more than one sound designer the film would be the best it can be in terms of sound design.

In films, a Sound Designer is a member of a film crew responsible for some original aspect of the film's audio. The original meaning of the title Sound Designer, as established by Coppola and Murch, was "an individual ultimately responsible for all aspects of a film's audio track, from the dialogue and sound effects recording to the re-recording  of the final track".

The sound designer is a important  member of the production staff, with creative authority equal to the film editor and director of photography.