Black Flag forged a unique sound early on that mixed the raw simplicity of the Ramones with atonal and microtonal guitar solos and frequent tempo shifts. The band was also known for the intense and evocative lyrics found in their songs, most of which were penned by Ginn. Like other punk bands of this era, Black Flag gave voice to an anti-authoritarian, non-conformist message, featuring songs punctuated with descriptions of isolation, neurosis, poverty, and paranoia, themes that would be explored further when Henry Rollins joined the group as lead singer in 1981. Most of the band's material was released on Ginn's independent label, SST Records.