Talk may help the ballyhoo. It does not enhance the entertainment and
is so palpably unnecessany that laymen are apt to sense this even if
lacking the trade knowledge to define the flaws.
Variety, 3 APRIL 1929, ON THE DIALOGUE
SEQUENCES IN THE GODLESS GIRL

The "coming of sound" meant different things to the production and exhibition ends of the industry. Although the pace of equipment installation varied considerably with each studio, the main producers had the capability of releasing dialogue films by the end of 1928. The wiring of theaters, however, took longer. The point at which 50 percent of theaters were projecting synchronized sound did not occur until sometime in 1930. This discrepancy meant that for a while Hollywood was faced with the need to supply two sets of prints to silent and sound-equipped cinemas. Such an arrangement may strike us...