Along with disco, funk was one of the most popular genres of music in the 1970s. Primarily an African-American genre, it was characterized by the heavy use of bass and "wah-wah" pedals. Rhythm was emphasized over melody. Artists such as James Brown, The Meters, Parliament-Funkadelic and Sly and the Family Stone pioneered the genre. It then spawned artists such as Stevie Wonder, The Brothers Johnson, Earth, Wind & Fire, Bootsy's Rubber Band, King Floyd, Tower of Power, Ohio Players, The Commodores, War, Kool & the Gang, Confunkshun, Slave, Cameo, the Bar-Kays, Zapp, and many more.