Adalberto Cecilio Álvarez Zayas, composer, arranger and conductor, is undoubtedly the Cuban sonero par excellence. Possessing a very personal and unmistakable harmonic and melodic style, "El Caballero del Son", a title that has been won by the anthological innovations and contributions made to that traditional and contemporary genre, turns out to be currently the most versioned musical author, in the Latin area in the last 40 years.