Originally a choir that specialized in mounting oratorios, the group eventually morphed into a light opera company in the early 1930s.
[1] In 1931 the organization was retitled the Eaton Operatic Society and then began to produce operetta productions in addition to presenting choral concerts, at a new auditorium at The Carlu.
The group also toured frequently with their productions to other cities in southern Ontario and performed at Canadian army bases during World War II.
In its early years, the Savoy operas of Gilbert and Sullivan were the chief part of the society's repertoire, including Iolanthe (1932, 1938, 1950), The Gondoliers (1933, 1939, 1948, 1954), The Mikado (1934, 1940, 1949), The Yeoman of the Guard (1935, 1941, 1952), and The Pirates of Penzance (1936, 1942, 1953).
Beginning in 1954, the society's repertory consisted exclusively of musicals and other operettas, including The Vagabond King (1957, 1965) and Rose-Marie (1959).