The Mothers of Invention was an American rock band from California. Formed on May 9, 1965, their work is marked by the use of sonic experimentation, innovative album art, and elaborate live shows. Originally an R&B band called the Soul Giants, the band's first lineup comprised Ray Collins, David Coronado, Ray Hunt, Roy Estrada, and Jimmy Carl Black. Frank Zappa was asked to take over as the guitarist when a fight between Collins and Hunt led to the latter's being fired. Zappa insisted they perform his original material—a decision that resulted in Coronado's leaving because he did not agree to the change—and on Mother's Day in 1965 the band changed its name to the Mothers. Record executives demanded the name be changed again, and so, "out of necessity", Zappa later said, "We became the Mothers of Invention", referring to the proverb "Necessity is the mother of invention".
