Emanuel Schikaneder heard this, he called down into the orchestra, "Hey, Mozart! That's no good, the music must express greater astonishment. They must both stare dumbly at each other, then Papageno must begin to stammer: 'Pa-papapa-pa-pa'; Papagena must repeat that until both of them finally get the whole name out. Mozart followed the advice, and in this form the duet always had to be repeated." Castelli adds that the March of the Priests which opens the second act was also a suggestion of Schikaneder's, added to the opera at the last minute by Mozart. These stories are not accepted as necessarily true
Mozart and dance eighteenth-century composers were expected to be adept at producing both 'popular' and 'serious' music, and that there was no categorical difference between the two.". Abert (2007) wrote, "the most striking aspect of these dances is their almost literally inexhaustible fund of invention. Although their form offers only limited scope for experimentation, each dance differs from the others." Lindmayr-Brandl (2006) writes that "[the dances] that are accessible today, brought to life in the concert hall or in recordings, represent a precious treasure, the immediate expression of the joy of life." Mozart included a substantial ballet at the end of his opera