What innovative technique did Warner Bros. use in their film "Don Juan"?

In "Don Juan," Warner Bros. introduced a groundbreaking technique known as the Vitaphone system, which involved playing pre-recorded sound synchronized with the film. This innovation marked a significant advancement in the film industry as it allowed audiences to experience sound alongside the visuals, creating a more immersive experience compared to the silent films prevalent at the time.

The Vitaphone system was particularly notable because it was one of the first instances where sound was not merely an addition to the film through live effects or intertitles, but rather an integrated part of the viewing experience, providing a synchronized soundtrack. This paved the way for the eventual transition from silent films to "talkies," where dialogue and sound effects could seamlessly accompany the action on screen. The use of accompaniment music and sound added depth to the storytelling and enhanced the emotional impact of the film, establishing a new standard for motion pictures moving forward.