Now, however, Salieri scholars, including Mr. Biba, are thrilled at what they regard as vindication. "I see a renaissance for Salieri," said Mr. Biba, who attributed much of the renewed interest to La Scala.  But some opera specialists believe it is a combination of developments -- and divas -- that has led to Salieri's resurgence.  The soprano Cecilia Bartoli recorded a selection of Salieri pieces last year to promote what she has called a forgotten and talented composer. Original scores and letters by Salieri are on display at the Palazzo Reale here through January, while one of the composer's largely unknown manuscripts of a 1774 aria fetched an unexpectedly high bid at Sotheby's auction house in London this month.  "It's not as easy as sitting down and deciding together that 2004 will be the Salieri year," said Nick Williams, director of international marketing for Decca Records, which released Ms. Bartoli's best-selling CD. While a trend was clearly developing, Mr. Williams said it was difficult to trace the source. "It's a sort of chicken and egg situation," he added, "but Salieri's profile has been raised."  Music historians have long held that Salieri's compositions merit attention, even if only to better explore the Viennese musical world that orbited Mozart's brilliant star. Both Salieri and Mozart composed at the Hapsburg court, where Salieri served in various roles for 50 years, 36 of them as court Kappelmeister.  Riccardo Muti, La Scala's music director, recently told the Corriere della Sera newspaper that "without the stepping stone of Salieri, it is more difficult to understand Mozart and his masterpieces." Mr. Muti also praised the score for "Europa," which he helped rebuild from a nearly illegible manuscript, saying it showed moments of brilliance that in certain places rivaled portions of "The Magic Flute" by Mozart.  Yet to some critics, Salieri excelled only in short arias and lacked the imagination to sustain longer, more complex pieces. So not everyone is thrilled about his return to the Italian opera scene. "It's not going to enter into the repertoire of any other opera house; this was the only occasion that justified it," said Duilio Courir, an editor of the classical music magazine Amadeus. "Maybe it's good for 'Europa Revealed' to resurface every 200 years, but we can safely wait another couple of centuries for the next performance."  That is an unwelcome prospect for the singers who spent as much as a year and a half learning roles marked by flurries of coloratura and lyrical leaps across the scales. "It's the most difficult part I ever sang," said Diana Damrau, one of two sopranos cast as Europa. "If it's only this one time, it's precious to me. Plus, maybe I can sing at concerts." In the neoclassical opera, involving love, violence and political discord in ancient times, Europa, once the lover of Zeus, helps resolve all disagreements after she discloses her identity -- thus the title "Europa Revealed."  Ms. Damrau, like many Salieri defenders, argues that Salieri "should not be forgotten." After all, he wrote more than 40 operas and wielded influence on some of music's greatest names. He counted Beethoven and Schubert among his pupils and often collaborated with Mozart. When Mozart died in 1791, his widow entrusted Salieri with the tutelage of their young son, a fact that seems to conflict with the murder myth.  That tale started circulating decades after Mozart's death, in the last years of Salieri's life -- born in Italy in 1750, he died in Vienna in 1825 -- because of a rivalry between Italian and German schools of music. Mr. Biba said the Germans began spreading rumors that Salieri, an Italian, had had a hand in the death of Mozart, an Austrian. Years later, the Russian poet Alexander Pushkin used verse to depict Salieri as venomous, an opinion that informed Peter Shaffer's ambiguous but nevertheless accusatory play "Amadeus," which was adapted into the Milos Forman movie.  "For many years, the guy was a murderer who poisoned our greatest composer," said Mr. Williams, of Decca Records.  Now, at the Ricordi music store in the arcade across the square from La Scala, there are not enough Salieri librettos to keep up with demand. And Decca, Mr. Williams said, had to ship more copies of Ms. Bartoli's recording to Italian stores to keep them in stock for holiday shoppers.  At La Scala, theatergoers spilling out between the heavy carmine curtains after a recent performance of "Europa" seemed more excited about Salieri the composer than Salieri the alleged murderer.  "It's been a long time since they let him back on the stage," said one audience member, Roberto Gilardi. "And even if he did kill Mozart, the music is beautiful all the same."
Article on renewed interest in Italian composer Antonio Salieri, whose operas were thrust into oblivion in wake of allegations that he murdered Mozart; Salieri's Europa Riconosciuta (Europa Revealed) has returned to La Scala for first time since theater's inauguration in 1778; photos (M)