In 1967, Hall was appointed curator of the Rodgers and Hammerstein Archives of Recorded Sound, one of the units of the New York Public Library's performing arts collections at Lincoln Center. There he pioneered new techniques of cataloging recorded material as one of the initiatives of the Research Libraries Group, a consortium of the nation's leading research libraries. Hall and his associates also released an important collection of historic sound recordings, "The Mapleson Cylinders", which captured the singing of Metropolitan Opera stars of the early twentieth century. This recording was given a Grammy Award by the National Academy of Recording Arts & Sciences in 1986.