Yes, you've heard at least part of The Four Seasons (whether you know it or not). But as expressive and iconic as that group of four concertos is, it represents only the tip of a rather large iceberg. This Italian Baroque composer (and violinist) brought his sprightly energy to hundreds of concertos, as well as dozens of operas and sonatas. Whether you listen to modern interpretations played on “period instruments” or indulge in modernized performance practices, you should seek out Vivaldi's characteristic strut (and gift for melody) in works for bassoon, cello, and sundry other instruments.