 "Show Girl in Hollywood" (1930), from First National Pictures (which Warner Bros. had taken control of thanks to its profitable adventure into sound), gives a behind-the-scenes look at some of the techniques involved in shooting early talkies.Several of the fundamental problems caused by the transition to sound were soon solved with new camera casings, known as "blimps", designed to suppress noise and boom microphones that could be held just out of frame and moved with the actors.In 1931, a major improvement in playback fidelity was introduced