After rival studio Warner Bros. has an enormous hit with its first talking picture, the 1927 film "The Jazz Singer", R.F. decides he has no choice but to convert the next Lockwood and Lamont film, "The Dueling Cavalier", into a talkie. The production is beset with difficulties, including Lina's grating voice and strong Brooklyn accent. An exasperated diction coach tries to teach her how to speak properly, but to no avail. In contrast, Don fares better when taking diction lessons ("Moses Supposes"). "The Dueling Cavalier"s preview screening is a disaster; the actors are barely audible thanks to the awkward placing of the microphones, Don repeats the line "I love you" to Lina over and over, to the audience's derisive laughter, and in the middle of the film, the sound goes out of synchronization, with hilarious results as Lina shakes her head while the villain's deep voice says, "Yes! Yes! Yes!" and the villain nods his head while Lina's squeaky soprano says, "No! No! No!"