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.
Western concert flute the transverse flute was redesigned. Now often called the "traverso" (from the Italian), it was made in three or four sections or joints with a conical bore from the head joint down. The conical bore design gave the flute a wider range and more penetrating sound without sacrificing the softer, expressive qualities. In addition to chamber music, the traverso began to be used in orchestral music. In the Baroque era, flutes become used in the scores of opera, ballet and chamber music. With this, composers wrote music for the flute. These included Praetorius, Schütz, Rebillé and Descoteaux, Quantz, Bach, Telemann,