Los Wembler's de Iquitos' name is synonymous with cumbia Amazonica, or chicha, the electric guitar-driven, psychedelic subgenre of Peruvian cumbia. Their early hit singles, including the oft-cited "Sonido Amazonico" and " La danza del Petrolero," have influenced generations of musicians from across the globe. Founded by shoemaker Salvador Sanchez with his five sons (Isaías, Jair, Alberto, Jairo, and Misael), they were unwittingly pioneers: They were among the first regional acts to deliver popular local rhythms via electric guitars, basses, and organs. Before 1980, they kept a...