Orestes López Valdés (August 28, 1908 – January 26, 1991), nicknamed Macho, was a Cuban multi-instrumentalist, composer and bandleader. As a double bassist he was a founding member of the Havana Philharmonic Orchestra, and later a member of the National Symphony Orchestra of Cuba. A long-time member of the charanga Arcaño y sus Maravillas, where he played cello and piano, he is considered the co-creator of the mambo, together with his brother Israel "Cachao" López, and one of the most prolific danzón composers of the 20th century.