Which film is considered the first genuine sound film?

"The Jazz Singer" is considered the first genuine sound film because it was the first feature-length movie to include synchronized dialogue, marking a pivotal moment in cinematic history. Released in 1927, it featured actors speaking directly to the audience, which was a groundbreaking technique at the time. Although there were earlier films that experimented with sound, such as short films with musical scores or sound effects, "The Jazz Singer" integrated these elements with dialogue, thus transforming the film industry and paving the way for the future of sound in cinema. It signaled the end of the silent film era and the beginning of "talkies," leading to significant technological innovations and changes in audience expectations regarding film entertainment.