Comprised of the Souls of Mischief foursome A-Plus, Opio, Phesto and Tajai and the rappers Casual, Del the Funky Homosapien and Pep Love; producer Domino; and DJs Jay-Biz and Toure, Hieroglyphics would go on to found its own record label, play shows around the world, brand themselves with one of music’s most enduring logos and, most recently, herald their own Oakland-based holiday and festival around Sept. 3, known as Hiero Day.