This grandiose duet is sure to be a show-stopper The dramatic opening in D minor and 4/4 meter sets the stage for a key change to D major. Both primo and second parts feature octaves, full chords, and sixteenth-note passages. The final section returns to D minor with a change of meter to 2/4 and a faster tempo. Glissandi in both parts bring the piece to an exhilarating close.