Movie music is sounds that evoke associations, even if you accidentally stumble upon a melody on the radio. Music in the movies is half the success of the tape. Film music is the work of one person.
Since its inception, cinema has been inextricably linked with music. When the Lumière brothers showed the first films, they invited pianists to drown out the crackling of the apparatus, then the improvisation of pianists for films of all stripes was replaced by collections called Music for Photo Plays, differing in mood, and then real composers came to the cinema.
A film composer is the one who creates the magic of sounds that acts on the subconscious of the audience and controls their emotion.
Writing music is not an easy process, and there are many factors that directors and producers must consider in order to find the right composer.
For example, the way of writing music: a music book and preliminary playback of melodies for the director on some instrument or an electronic method of writing in special computer programs Logic Pro, Digital Performer, Cubase, etc. and a file on a computer that the film crew can listen to on their own.