Changüí is the rural dance and music of Guantánamo in eastern Cuba, and one of the direct ancestors of son. It is danced without clave, with a gliding, shuffling step: the feet stay close to the ground instead of being lifted.
No clave
Changüí emerged in the 19th century in eastern Cuba, around Baracoa and Guantánamo, on the sugar plantations and in rural communities. It combines Spanish elements (the song form and the guitar, from which the tres grew) with African rhythms and percussion. Changüí descends from nengón and is related to kiribá.
And, just like the dance: no clave. That is the big difference from son.
Changüí is seen as a forerunner of son montuno, and so of salsa. Through bands from Guantánamo, such as that of Elio Revé, changüí elements also found their way into Havana dance music.
According to EcuRed, changüí is the genre closest to son, rooted in the mountains of Guantánamo, where families have played it since around 1860. There were no fixed groups: as soon as a tres player turned up at a party, the others joined in, and such a party could last two or three days, especially around Christmas and New Year. The bongó de monte is larger than the usual bongó and plays accents like the quinto in rumba. A changüí consists of the copla, sung by the whole group, and the montuno, in which a soloist improvises and the chorus answers. Arsenio Rodríguez, Juan Formell (Los Van Van) and Elio Revé also drew on it.