How did the introduction of sound in films change cinematic techniques?

The introduction of sound in films significantly transformed cinematic techniques, particularly through the development of synchronized dialogue. This innovation allowed for more nuanced storytelling, as characters could express emotions, intentions, and humor through spoken words, rather than relying solely on visual cues and title cards. This capability increased audience engagement, as viewers were able to connect with characters on a deeper level when they could hear their voices. The inclusion of sound also led to advancements in sound design and the use of music, which became integral in enhancing the mood and atmosphere of films. This marked a pivotal moment in cinema history, as filmmakers began to explore the combination of sound, visuals, and narrative structure in new and creative ways, changing the overall experience of watching films.