Opera Australia Orchestra associated with working in the Sydney Opera House orchestra pit. The OAO provides orchestral accompaniment to Opera Australia and The Australian Ballet and is one of the few opera orchestras in the world that operates in a repertory style of operation over a period, or season, that can be some months in length. Other opera houses that operate this way are The Metropolitan Opera in New York City, The Royal Opera House Covent Garden in London and La Scala, Milan. 'Repertory style' also infers that over time, certain composers and operas become considered 'standard' to the working operation of the
Attila (opera) Ramey "unquestionably rack[ed] up more performances in the role than any bass since its creator" in houses such as La Fenice and San Francisco, finally making an audio recording in 1989 and a video recording in 1991, both under Riccardo Muti. Ramey again appeared in the title role in a production staged by La Scala in 1986 and filmed for DVD release. In February 2000 a concert performance was given by the Opera Orchestra of New York, again featuring Ramey as Attila. The Royal Opera House premiered it on 13 October 1990, with Ruggero Raimondi in the title role, Josephine