Collection contains professional correspondence for when Don L. Earl was a professor at Brigham Young University, newspaper clippings of operas and other events in which he was involved, class and student files, photographs and slides including those of operas performed at BYU, music scores, production programs, and other materials relating to Earl's time as faculty at BYU and during his musical career, 1952-1978.

Contains personal correspondence, articles, programs, news clippings, yearbooks, scrapbooks, poetry, resumes, tributes, journals, photographs, patriarchal blessings, and biographical materials. Also includes published, unpublished, and workcopy music manuscripts by the Madsens. Materials date from 1870 to 1976.

Contains promotional posters for student produced operas at Brigham Young University, portfolios from Brigham Young University students who took the class titled "Opera Workshop," and photographs related to the opera program at the BYU School of Music. Materials record the operatic history of BYU's students from 1974 to 2017.

Collection includes photographs of the production of the Tribute to Max Steiner program produced by the Brigham Young University Department of Music in April 1981.

Collection contains photographs, correpsondence, postcards, programs for BYU Music Department productions, newsletters for RCMI, newspapers clippings on the Music Department and Symphonic Band, study abroad fliers, and photographic slides, 1966-1976.