This article introduces the factors that affected the art of composing music for the film and development of this art in the beginning of its history.
Then, it defines the elements that create harmonic structure and relation between film and music; also it clarifies the elements that form the structure of the work of a film composer.
Finally, the article introduces the criteria and characteristics or peculiarities of the work of film composer by presenting the point of views of famous group musicians and film theorists.
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