Anton Haizinger heard Haizinger sing in concerts, and offered him an engagement at the theatre; Haizinger gave up teaching. Haizinger's first roles at Theater an der Wien, in 1821, were in two operas by Rossini, as Gianetto in "La gazza ladra" and Lindoro in "L'italiana in Algeri". He soon became well-known in Vienna. The role of Adolar in Weber's opera "Euryanthe", premiered in 1823 at the Theater am Kärntnertor, was created for him, and he was a soloist in the premiere in 1824 of Beethoven's Ninth Symphony at the same theatre. He continued studies with Antonio Salieri. At this time, Italian opera
Rocco Filippini concerts at the La Scala theatre in Milan, where he has played in recitals with cello and piano, performed the György Ligeti concerto with the Scala Philarmonic Orchestra, and taken part in many chamber music concerts, often in association with Maurizio Pollini, with whom he has performed concert programmes for several jears in Rome, London, Tokyo and New York, and at the Rossini Opera Festival in Pesaro and Salzburg festivals. At the Salzburg Festival in 2002 he premièred Fabio Vacchi’s "Tre Veglie", with Anna Caterina Antonacci, accompanied by the Orchestre de Paris conducted by Ivan Fischer. In 1979 he was