Unlike the free-for-all scripts at Paramount, Thalberg insisted on a strong story structure that made the brothers more sympathetic characters, interweaving their comedy with romantic plots and non-comic musical numbers, and targeting their mischief-making at obvious villains. Thalberg was adamant that scripts include a "low point", where all seems lost for both the Marxes and the romantic leads. He instituted the innovation of testing the film's script before live audiences before filming began, to perfect the comic timing, and to retain jokes that earned laughs and replace those that did not. Thalberg restored Harpo's harp solos and Chico's piano solos, which had been omitted from "Duck Soup".