The earliest extant sound film, but the phonograph soundtrack has been lost. It depicts William K.L. Dickson standing in the background next to a huge sound pickup horn connected to a Thomas... Read allThe earliest extant sound film, but the phonograph soundtrack has been lost. It depicts William K.L. Dickson standing in the background next to a huge sound pickup horn connected to a Thomas Edison phonograph recorder.The earliest extant sound film, but the phonograph soundtrack has been lost. It depicts William K.L. Dickson standing in the background next to a huge sound pickup horn connected to a Thomas Edison phonograph recorder.