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
La Scala orchestra pit had not yet been built. Above the boxes, La Scala has a gallery—called the "loggione"—where the less wealthy can watch the performances. The gallery is typically crowded with the most critical opera aficionados, known as the loggionisti, who can be ecstatic or merciless towards singers' perceived successes or failures. For their failures, artists receive a "baptism of fire" from these aficionados, and fiascos are long remembered. For example, in 2006, tenor Roberto Alagna was booed off the stage during a performance of "Aida". This forced his understudy, Antonello Palombi, to quickly replace him mid-scene without time to change