Harold Orozco Rengifo was a driving force in the new wave of beat-driven rock and funk that swept through Colombia in the late 60s and early 70s, which took some influence from US and British rock and gave it an unmistakable injection of Latin flair. One of his most treasured projects is Harold Y Su Banda, responsible for one sole record of funky perfection in 1975. Evolucion is a digger's delight, featuring the kind of universal but also incredibly geo-specific grooves that add so much depth and breadth to a set. There's a good reason why this is considered one of the best records of the 1970s.