The instrumentation of this sonata with obbligato harpsichord and continuo is somewhat unusual and will not always be easy to organize. Ideal for the continuo is certainly a second harpsichord and a second viol. Another chordal instrument, for example, a theorbo, would also be a possibility. In order for the piece to be performed with minimal forces, that is to say, with one viol and one harpsichord, our harpsichord part additionally contains the figured bass, so that the harpsichordist can take...