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.
Bass flute The sixth movement of Claude Bolling's suite for Flute and Jazz Trio, 'Versatile' has the soloist playing the opening melody on a bass flute. Morton Feldman's composition "Crippled Symmetry" has a part for the bass flute, as does John Cage's late work "Seven2". Hans Pfitzner's 1917 opera "Palestrina" features an early (true) C bass flute part. Another piece featuring the bass flute is John Mackey's "The Frozen Cathedral" (2013) in two separate sections of the piece. For an extensive list of repertoire for bass flute and contrabass flute see "Repertoire Catalogue for Piccolo, Alto Flute and Bass Flute" (2004) by