Boismortier’s numerous musical achievements include composing the first (and probably the only) concertos for two unaccompanied melody instruments, namely his Op. 38: VI Concerto pour 2 Flutes-traversieres ou autres Instrumens, sans Baße. These remarkable works date from 1732, by which time he had already written several sets of sonatas with the same scoring. But unlike the sonatas, which generally conform to the Italian sonata da camera and treat both instruments equally, the Op. 38 concertos a...