Sonata 5, in A major, is the only work in the set to feature the classic three-movement design in its symmetrical fast–slow–fast configuration. The opening Vivace makes considerable demands on the flautist’s technique, and the accompanist, too, has some lively interventions. A short Andante, in A minor, recaptures the style of the slow movement of an operatic sinfonia. High spirits return in the concluding Allegro comodo, which manages to be frothy and substantial at the same time. Sonata 6 is i...