Phi Mu Alpha Sinfonia was established for male musicians in 1898 as a secret society, and in 1900 became a collegiate fraternity. The collection contains the University of Oregon's Psi Chapter records including a fraternity scrapbook, correspondence, and records of honorary members.

Pi Beta Women's Fraternity was founded in 1912 at Northwestern University of Evanston, Illinois, as a professional fraternity for women who are outstanding in music and speech arts. The collection contains records that document the functions, activities, and people of the fraternity.