Joseph Glassman, a music editor for Universal Studios who worked with Alfred Hitchcock, Henry Mancini, John Williams and Steven Spielberg, died Dec. 11 of natural causes at his home in Brentwood. He was 88.A native of Chicago, Glassman came to Hollywood in 1928. After serving in World War II, he started as an apprentice in the studios. Glassman worked on the TV shows “Alfred Hitchcock Presents,” “Peter Gunn,” “The Virginian” and “The Bionic Woman,” and feature films including “Jaws” (1975) and “The Last Tycoon” (1976). He was a board member of the Editor’s Guild and helped to change health and welfare plans and to gain screen credit for editors. He also was a member of the Motion Picture Academy. Glassman is survived by two daughters and a grandson. In lieu of flowers, the family requests that donations be made to the UCLA Medical Center Auxiliary.