This is the debut CD for Efecto, a six-man Chilean prog band, initially released by the band in 2006, remastered in 2009 for this edition on the Mylodon label. Efecto have somewhat novel instrumentation, using both synthesizers and vibraphone. They actually have two keyboardists and two drummer/mallet percussionists, plus guitars (electric & acoustic) and bass. Their music straddles fusion and a flowing style of symphonic prog, with vocals (in Spanish), but instrumental content dominates. To some extent, Efecto are of the lineage of Congreso, Fulano, and Los Jaivas, three great first-generation Chilean prog bands, and as such, they are one of the most sophisticated bands on the Mylodon label.