He never lent the discs to anyone. He never sold them. Years later, when streaming services arrived, claiming to have the "Complete Discography," Mateo would just smile. They had the albums. But they didn't have the negro . They didn't have the sound of the rain on the roof, the weight of the unpolished stone.

, often focusing on their debut self-titled album, popularly known as the " Disco Negro " (Black Album). The "Disco Negro" (Caifanes, 1988)