For this program, the first in a series of three featuring keyboard and violin, Ian Swensen and Kenneth Slowik have chosen works in the festive key of D Major and its melancholic relative, B minor: Haydn: Sonata in B minor, Hob: XVI:32; J. S. Bach: Partita in D major, BWV 828; Sonata in B minor, BWV 1014; and the Fifth Brandenburg Concerto, BWV 1050.