The six Sonatas for Violin and Obbligato Harpsichord BWV 1014-1019 (“obbligato” – compulsory – means the keyboard is fully scored, as opposed to basso continuo for which only the bass is scored, the rest being left to the discretion of the performer, who improvises) are some of these works that Bach kept revisiting and reworking. The oldest remaining source – from around 1725, through one of his nephews – already highlights the will to make these compositions evolve by refining them with successive adjustments. The work underwent another overhaul in Agricola’s manuscript, around 1741, while a copy made around 1750 by Altnickol reveals a third cycle status. An observation made by the musician’s second youngest son, Johann Christoph Friedrich Bach – “He wrote these trios just before his end” – seems to have been interpreted as proof that Bach was still working on these sonatas in the last years of his life. This new recording by Isabelle Faust, a great specialist of baroque interpretation, and Christian Bezuidenhout on the harpsichord, discretely reveals the extraordinary richness of these works’ three-voice writing, that resembles the format of a trio sonata.