Orig­i­nally a Span­ish dance in 3/4 time, it was changed in Cuba ini­tially into 2/4 time then even­tu­ally into 4/4. It is now present as a very slow type of Rumba rhythm. The music is fre­quently arranged with Span­ish vocals and a sub­tle per­cus­sion effect, usu­ally imple­mented with Conga or Bongos.