Soundgarden was formed in 1984 by vocalist Chris Cornell, guitarist Kim Thayil, and bassist Hiro Yamamoto. The band signed with the independent label Sub Pop and released the "Screaming Life" EP in 1987 and the "Fopp" EP in 1988. In 1988, the band signed with legendary punk record label SST Records and released its debut full-length album "Ultramega OK". The band subsequently signed with A&M Records, becoming the first grunge band to sign with a major label. In 1989, the band released its first album for a major label, "Louder Than Love".