Final answer:
In the silent era, Sergei Eisenstein developed a system for analyzing film montages and determining the timing of the music needed.
Step-by-step explanation:
In the silent era, a system for analyzing film montages to determine the timing of the music needed was developed by Sergei Eisenstein. He was a prominent Soviet film director, and his theories and techniques revolutionized the art of filmmaking.
Learn more about Development of film analysis techniques