Primarily consists of mixtapes created by Doug Lang, which span many genres of music, including classical, folk, jazz, and pop. Often a track list is included with the cassette, as well as original artwork. Series also contains ephemera such as event fliers and programs of musical groups Celtic Thunder and The Fast Flying Vestibule, of which Irish-American poet, writer, and musician Terence Winch was a founding member.

Recordings have been digitally copied; all original media were retained, but may not be played due to format. Digital use copies can only be accessed in the Burns Library Reading Room.