Incomparably joyous and sparkling, these six pieces can claim to be both the greatest of baroque instrumental works and, with the possible exception of Vivaldi's "Four Seasons" concertos, the most popular. Composers in the baroque era (roughly 1600-1750) prioritized a musical skill called counterpoint, the practice of combining independent instrumental or vocal lines into a complex whole. Johann Sebastian Bach had no rivals (and surely never will) in this art, giving every section of the orchestra something rewarding — and fun — to do. He built structures of grandeur and irresistible energy. Each of these concertos are scored for a different combination; if you'd like a taste, try the first movement of the Concerto no. 2, in which four bright-toned soloists (violin, flute, oboe and trumpet) dance festively around the accompanying string orchestra, or the fleet finale of the Concerto no. 3, a whirlwind showpiece for strings alone.