Trio Sonata in G major, BWV 1039

This sonata, scored for two transverse flutes and continuo, is one of the few trio sonatas that can genuinely be attributed to Bach. Although traditionally thought to have been composed during Bach's period in Weimar or Cöthen, Bach scholars have revised that dating based on an analysis of the extant manuscripts and on stylistic considerations. According to Wolff (1994), the trio sonata was composed between 1736 and 1741 in Leipzig, where, since 1729, Bach had been director of the Collegium Musicum, a chamber music society performing weekly at the Café Zimmermann. The version for viola da gamba and harpsichord, BWV 1027, as well as the other two sonatas for this ensemble, are dated by Laurence Dreyfus, Christoph Wolff and others to the same period.