Strut present 3 separate reissues of the 1970s album trilogy from Idris Ackamoor & The Pyramids. As students at Antioch ollege, Ohio, alto saxophonist Idris Ackamoor, flautist Margaux Simmons and bass player Kimathi Asante created three lasting monuments in sound — Lalibela, King of Kings, and Birth / Speed / Merging, a trio of albums produced without any label backing or distribution between 1972 and 1976. Their music is unique among the varied canon of avant-garde and experimental music of 1970s America: high intensity African-styled percussion topped with songs, chants, and horns, laced with African instruments and arranged into long, flowing suites that surge and roll.

Birth/Speed/Merging was recorded in 1976 after the band's move to San Francisco. The album closes the Pyramids' 70s trilogy and makes more use of studio technology: adding overdubs and other effects, a marked departure from the previous two releases, though at no cost to the urgent message and energy of their earlier works.