The Magic Flute chorus for several numbers (notably the finales of each act). Mozart also called for a "" (instrument of steel) to perform Papageno's magic bells; an instrument which has since been lost to history, though modern day scholars believe it to be a keyed glockenspiel, which is usually substituted with a celesta in modern-day performances. Charles Rosen has remarked on the character of Mozart's orchestration: "Die Zauberflöte" has the greatest variety of orchestral color that the eighteenth century was to know; the very lavishness, however, is paradoxically also an economy as each effect is a concentrated one, each one—Papageno's whistle, the
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