Who directed a sound film first Béla Gaál or Millard Webb ?
Béla Gaál:  His 1930 film "Csak egy kislány van a világon" was the first sound film to be made in Hungary. Millard Webb: Millard Webb (6 December 1893 – 21 April 1935), was an American screenwriter and director. Millard Webb:  Webb also directed the early sound Florenz Ziegfeld produced talkie "Glorifying the American Girl" released by Paramount in 1929.
Millard Webb