The sous-fonds contains photographs, newspaper clippings, correspondence, programs, reports, and sound recordings of performances. It also contains information about students and teachers (both Sisters and lay teachers), award winners, and alumni. It has material about the administrative activities of the Academy, its history, including the opening, closing graduations and yearbooks, notable groups such as the Academy Singers, and correspondence with the Ministry of Education of Ontario.

This sous-fonds contains materials related to the activities of the St. Joseph's School of Music, including rosters of staff and students, music festival results, sheet music, photographs and scrapbooks.

The fonds consists of histories, lists of administrators, orientation manual, school mandate, yearbooks, an alumnae association booklet containing the constitution and bylaws, a pledge, and a diploma.