(Documentary) (grateful thanks)
"The Speed of Sound: Hollywood and the Talkie Revolution, 1926-1930".
Did You Know?
The backstage musical came about because a lot of people then and now had a problem with people breaking into song within an ostensibly realistic setting. Where does the orchestra come from? In a backstage musical we're on stage, so that's not a problem.
Ghost-writer of Robert Wagner's autobiography.