The concerts grew in number from five in the inaugural season to fourteen in 1989; in 1990 the entire festival was given over to the production of Serinette, a commissioned opera by Harry Somers.
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Serinette, a 'Festival opera' in two acts with music by Harry Somers and libretto by James Reaney, was commissioned with the support of the Canada Council and the Ontario Arts Council for the tenth season (1990) of Music at Sharon; it was designed specifically for production in the Temple.