Contains opera files from his time overseeing and directing the opera program at Brigham Young University, music seller files, symphony orchestra programs, workshops, convocation addresses, newspaper clippings, correspondence, and other administrative materials that were collected during his time as a professor of music at Brigham Young University, 1953-1978.

Contains scores that belonged to Don Earl that were collected by him for his personal and professional use.

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.