As the disco era came to a close, a new generation of producers began adding synthesizers and slick drum machine beats to African-American music. Michael Jackson was among the first post-disco black musicians to cross over to mainstream audiences. In its early years, mainstream R&B was very pop-oriented. Notable 1980s R&B musicians include Luther Vandross, the SOS Band, Mtume, Freddie Jackson, DeBarge, Loose Ends, Stephanie Mills, and Marvin Gaye.