The Magic Flute the Night, evidently needed little such help: this role is famous for its difficulty. In ensembles, Mozart skillfully combined voices of different ability levels. The vocal ranges of two of the original singers for whom Mozart tailored his music have posed challenges for many singers who have since recreated their roles. Both arias of the Queen of the Night, "O zittre nicht, mein lieber Sohn" and "Der Hölle Rache kocht in meinem Herzen" require high F, rare in opera. At the low end, the part of Sarastro, premiered by Franz Xaver Gerl, includes a conspicuous F in a few locations.
The Magic Flute (at right), which does not give full names; "Hr." = Herr, Mr.; "Mme." = Madame, Mrs.; "Mlle." = Mademoiselle, Miss. While the female roles in the opera are assigned to different voice types, the playbill for the premiere performance referred to all of the female singers as "sopranos". The casting of the roles relies on the actual vocal range of the part. The work is scored for two flutes (one doubling on piccolo), two oboes, two clarinets (doubling basset horns), two bassoons, two horns, two trumpets, three trombones (alto, tenor, and bass), timpani and strings. It also requires a four-part