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
Welsh National Opera with the company's musical director James Lockhart, Geliot is credited by "The Times" with introducing new young singers and "directing a host of groundbreaking productions" before leaving in 1978. The critic Rodney Milnes wrote in 1975 about WNO's productions: In 1973 Geliot's WNO staging of Britten's "Billy Budd" with Allen in the title role was presented on a Swiss tour, and two years later it was given in Barcelona. The company returned to London with its participation in the Amoco Festival of Opera at the Dominion Theatre in 1979, presenting "The Makropoulos Case", "The Magic Flute", "Ernani", "Madame Butterfly", and