It's dated now but covers the golden years of film music in Hollywood, starting from the silent era and moving into the 1950s. I learned several things, e.g., that silent film music was far from spontaneous. Compilations of music were available to suit the mood of every scene, e.g., spooky, romantic, even orgy. When films were shot on location a couple of musicians were brought along to play for the actors as the movie was filmed, to help them get in the mood.
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