The sous-fonds consists of a variety of materials related to the Sisters of St. Joseph Concert Band, including photographs, various textual records, scrapbooks, audio cassettes, and compact discs.

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.