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
British National Opera Company free of charge, to support the company. She did not, however, feel equal to relearning her old roles in English translation, and she sang in Italian while the rest of the company sang in the vernacular. The British National Opera Company was a pioneer of broadcast opera, with excerpts from "The Magic Flute" broadcast live from the Royal Opera House by the British Broadcasting Company in January 1923, less than a year after the foundation of both the BBC and the opera company. The company's first artistic director was Percy Pitt, who had been music director with the Grand Opera