The extent, if any, to which the Sonata in E flat major for flute and obbligato harpsichord, BWV1031, can be attributed to Bach remains in dispute. Probably dating from the early to mid-1730s this immediately appealing music may well be a joint venture of Bach himself and one or other of his two elder sons, perhaps Carl Philipp Emanuel. What is indisputable, however, is the high quality of its craftsmanship and its expressive charm. The opening ‘Allegro moderato’ is introduced by a delightful eight-bar melody played by the harpsichord, after which the flute enters with the main theme. The ‘Siciliano’ is rewardingly written for the flute, its musical substance recalling the first movement of Bach’s C minor violin sonata (BWV1017). In the spirited binary ‘Allegro’, with its repeated sections, there is effective interplay between the two upper parts, bringing this pleasing sonata to a lively conclusion.
from notes by Nicholas Anderson © 2002