Blame it on the bossa nova. So pervasive was that intoxicating, romantic and gentle Brazilian beat that an alternative had to arrive. It came in the form of tropicalia, or tropicalismo, blending the popular with the avant-garde, fusing Brazilian and African rhythms with that old-time rock and roll. Tropicalia rose to prominence along with música popular brasileira (MPB), offering young people an alternative to bossa nova, which had by that point risen to international prominence. Emerging Brazilian artists of the day found a sound of their own. Real Gone Music and its…