The collection contains 37 78 rpm 10-inch recordings, 1 7-inch 78 rpm recording, 1 5-inch 78 rpm recording, and 1 7-inch 45 rpm recording. The recordings are all commercial releases consisting of classical, ethnic, and popular music.

The collection contains 84 10-inch sound recordings of jazz, blues, ragtime, and boogie woogie.

The collection contains Lejaren Hiller's personal collections of reel to reel tapes pertaining to his compositional output. It includes recordings of live performances of works as well as recordings of some of the electronic source materials used in other compositions.

The collection of Livingston Gearhart Recordings contains reel to reel and cassette tapes, compact discs, and LPs containing music composed, arranged, or performed by Livingston Gearhart.

The Mischa Schneider Collection of Test Pressing Recordings contains fifty-one sound recordings on 12-inch discs. The content includes eighteen recordings of performances by the Budapest String Quartet and twelve recordings issued by the Marlboro Recording Society.

Contains correspondence, writings, concert programs, articles, scores, and recordings.

The collection of Slee Lecture Recital Recordings contains 94 reel to reel tapes of lectures by the named Slee Visiting Lecturer in the Music Department at the State University of New York at Buffalo.

The Yvar Mikhashoff Trust for New Music Records contain applications, including scores and audio/video recordings, submitted by individuals and organizations for grants from the Trust.