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
Country house opera Country house opera Country house opera is opera performed at a country house, whether in the house itself, in the grounds, or in an adapted or purpose built theatre on the grounds. It is a feature in particular of the English summer. Country house opera is usually initiated by private enthusiasts, and relies almost exclusively upon private funding. This distinguishes it from the UK's state subsidised opera companies which, like most opera houses around the world, are based in city centres. Black tie is often "de rigueur", in contrast with the Royal Opera House in London and other city operas