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
Libretto of The Magic Flute libretto attracted the admiration of Franz Liszt, who after attending a performance copied down several of them in a personal letter. Ingmar Bergman in his 1975 film of the opera gave special treatment to the didactic poetry by having his characters hoist "a series of placards on which these moral sentiments are carefully lettered." The passage quoted above beginning "Zwei Herzen" has attracted particular admiration: Heartz called it "the loveliest of all the opera's beautiful moments"; Abert wrote of "a paradisal radiance unique in this work". Liszt quoted Schikaneder's verse in his letter and appended, "Amen!". A matter that perturbs