“Something new every moment.” If we are to believe Shunske Sato, leader of Concerto Koln and soloist on this sparkling new release of Antonio Vivaldi’s “Four Seasons,” what is at the heart of this recording is the idea of freedom. Freedom, too, in more ways than one. True to the principles of historical performance practice, the ensemble delivers the vitality of spontaneous playing in Vivaldi’s music. Founded in Cologne in 1985 and at home on the great international concert platforms of the world ever since, Concerto Koln has developed a quite unique sound of its own, which is known and admired around the world. A major music magazine once wrote that the ensemble played antique rock and roll- “rousing, raw, and jovial.” The “Four Seasons,” are joined here by two other Vivaldi works, showing other aspects of the composer and rounding out our picture of him: the sad and sorrowful Good Friday music “Al Santo sepolcro” and the Concerto RV 156, which may be the most beautiful concerto Vivaldi ever wrote. This audiophile recording was made in the Paterskirche in Kempen, celebrated for its acoustics. There were no cuts, no stopping and starting, just one take, no compressors or artificial resonance. This recording simply documents an end-to-end performance by musicians at the highest level of concentration. This music sounds so natural and immediate, it’s as if one were hearing it live at a concert.