Guarapachangueo, invented by the group Los Chinitos in Havana in the 1970s, is based on "the interplay of beats and rests," and is highly conversational (Jottar, 2008). Far from the standardized regularity of the drum rhythms of recordings such as Alberto Zayas's "El vive bien", guarapachangueo often sounds slightly random or unorganized to the untrained ear, yet presents a plethora of percussive synchronicities for those who understand the clave. Using both cajones (wooden boxes) and tumbadoras (congas), Martinez and Diaz reflect the tendencies of their generation of rumberos in combining these instruments, which widens the sonic plane to include more bass and treble sounds.