There are keyboards and keyboards. Baroque composer would think of the harpsichord and mention in the piece’s name that the piece is meant for violin for instance and basso continuo. The basso part would be played on the harpsichord. Joseph Haydn would write a keyboard concerto and think of still using the harpsichord or the newly invented fortepiano, a harpsichord that can play loud (forte) and soft (piano) sounds. Today one would play it on the modern piano unless… unless Viviane Chassot were around. She is a Swiss musician with a penchant for experiments and she plays Haydn’s keyboard parts on the accordion while the Kammerorchester Basel plays the tutti parts.