Sonatas for two instruments and keyboard Sonatas for two instruments and keyboard BWV 1036 Trio in d minor BWV 1037 Trio in C major BWV 1037 Trio in C major with piano voice BWV 1038 Trio in G major BWV 1038 Trio in G major with piano voice BWV 1039 Sonata in G major BWV 1040 Trio in F major