1930s & 40s- IN INDIA

Alam Ara (The Light of the World; 1931), directed by Ardeshir Irani, was the first Indian sound film.
Chandidas(1932), directed by Debaki Bose under New Theatres banner, contained background Music for the first time in Indian Cinema. Music Director was Raichand Boral, also known as R.C. Boral.
Debaki Bose's Seeta(1934), made under the banner of East India Film Company, was the first Indian talkie shown in any International film festival. It was shown in Venice Film Festival, where it won an Honorary Diploma. He was the 1st Indian director to receive any international award.
Nitin Bose's 1935 film Bhagya Chakra, produced by New Theatres, was the first Indian film to use playback singing. The singers were K C Dey, Parul Ghosh and Suprabha Sarkar.[8] The movie was remade in Hindi with the title Dhoop Chhaon, which was the first Hindi film to use playback singing.
Neecha Nagar (Lowly City) (1946), directed by Chetan Anand, bagged the Palme d'Or (Best Film) award, (then known as 'Grand Prix'), at the Cannes Film Festival in 1946, and became the first Indian film to get major recognition in international film festivals