The William A. Chrystal papers, 1946-2015, contain Chrystal's music manuscripts, programs, clippings, professional documents, and sound recordings.

Series 1 contains primarily manuscript music scores by Chrystal. These include Chrystal's arrangements for piano or another solo instrument of classical works, popular songs, and jazz standards, and scores of Chrystal's original compositions, including incidental music for orchestra.

Series 2 contains programs of musical events that Chrystal participated in as a pianist, conductor, or composer. Also included are clippings, photographs, and a scrapbook of professional correspondence and documents. This series also contains some materials related to Chrystal's students, including musical theater composer Stephen Flaherty.

Series 3 contains unpublished sound recordings featuring Chrystal as a pianist, conductor, arranger, or composer. The majority of the analog tapes in this collection have been digitized.