Grupo Maravilla de Robin Revilla is among one of the most important bands in the emergence of the second wave of cumbia sonidera as popular music in Mexico, with its creation of the "Poblano style" from the city of Puebla. It is characterized by the use of synthesizers and psychedelic guitars and effects. Some other principal groups to emerge beside them were Grupo Soñador, Los de Akino, and Los Papis. The electro cumbia of the 21st century would likely sound somewhat differently without them. They've charted all over Latin America and in Europe -- particularly in France. Give...