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
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,