What is the first film with playback song?

The first film to feature a playback song is widely recognized as the Indian film "Alam Ara," released in 1931. Directed by Ardeshir Irani, it marked a significant milestone in Indian cinema by incorporating pre-recorded music that was played during the film, allowing actors to lip-sync to the songs. This innovation laid the groundwork for the musical format that would become a hallmark of Indian films.