With an historical perspective in mind, describe the connection between film music and commercial sale of music in America.

What will be an ideal response?

Film music has always been associated with the sale of music outside of the theatre. The music of early film became associated with the sale of sheet music developed by Tin Pan Alley. Over time, this blending of the film industry and the recording industry continued, with moviemakers actually packaging film music that they thought would appeal to audiences after they left the theatre. This linking works in the opposite way as well, when already-known popular songs are heard in the soundtrack as part of the story, helping to evoke a mood, or taking the audience to an historical time period. This has led to the revitalization of some older popular tunes that enjoyed a resurgence of popularity due to the film.