The Allen Sigel Collection of Scores, 1946-1998 contains approximately 27 compositions by Allen Sigel. Many of them are present in multiple versions. There are also ten works by other composers in arrangements by Sigel and three of his didactic works for clarinet.

Contains 45 manuscript compositions, 4 manuscript arrangements, and 5 published compositions. It also contains an article written by Winning and two programs for concerts in Buffalo, New York.

The collection consists of 79 works by Morton Feldman in either score or part formats (72 scores; 7 sets of parts). All but one item are ink manuscripts on vellum. These served as the masters that Feldman submitted to C. F. Peters and Peters published directly from these masters. Almost all of the manuscripts are in Morton Feldman's hand, except for two scores copied by John Cage and three items in the hand of a music copyist.

This is the largest collection of Ferdinand Praeger's manuscripts in the world, consisting of approximately 480 works. The majority of the works are for piano, but the collection also includes chamber music for strings, large ensemble works, vocal works, and sketches. The dated works range from 1829-1891, but many works are undated.

The collection contains scores and parts of original compositions and arrangements by Frederick Slee. It also includes transcriptions of works by composers such as J.S. Bach, Mozart, and Haydn, as well as a lesson for recorder.

The collection contains scores and parts of twenty original compositions by Friedrich Otto Trautmann, a composer and organist who lived in Germany and England in the late nineteenth to early twentieth century.

The collection contains scores of five compositions by John Myhill in varied states of completion and a folder of sketches and musical analyses. The collection also contains a folder of prose writings and a single piece of correspondence to Myhill.

The collection contains scores of 33 musical works by composer, singer, and librarian Joseph Chouinard.

The collection consists of 123 scores of compositions by Leo Smit, principally in copies of holographs. There are 21 scores of works by other composers arranged or transcribed by Smit. The remaining 41 scores are works by other composers either inscribed to Smit or marked for performance by Smit.

The Livingston Gearhart Collection of Scores contains compositions and arrangements by Gearhart in published and manuscript forms, as well as sketches and incomplete works. It also contains published scores by other composers annotated by Gearhart.