duet "" and the whole accompanying scene involving Zerlina and Leporello from the Viennese version is almost never included. Although the same singer played both Masetto and the Commendatore roles in both the Prague and Vienna premieres, in modern-day productions, the roles are typically taken by different singers (unless limited by such things as finance or rehearsal time and space). The final scene's chorus of demons after the Commendatore's exit gives the singer time for a costume change before entering as Masetto for the sextet, though not much time. Roles Instrumentation The instrumentation is: Woodwinds: two flutes, two oboes, two clarinets and two bassoons Brass: two horns, two trumpets, three trombones Percussion: timpani Strings: first violins, second violins, violas, cellos and double basses Basso continuo in secco recitatives of harpsichord and violoncello (period performance practice often uses a fortepiano only) Mandolin Synopsis Don Giovanni, a young, arrogant, and sexually promiscuous nobleman, abuses and outrages everyone else in the cast until he encounters something he cannot kill, beat up, dodge, or outwit. Act 1 The overture begins with a thundering D minor cadence, followed by a short sequence which leads into a light-hearted D major allegro. The garden of the Commendatore Leporello, Don Giovanni's servant, grumbles about his demanding master and daydreams about being free of him ("" – "Night and day I slave away"). He is keeping watch while Don Giovanni is in the Commendatore's house attempting to seduce or rape the Commendatore's daughter, Donna Anna. Don Giovanni enters the garden from inside the house, pursued by Donna Anna. Don Giovanni is masked and Donna Anna tries to hold him and to unmask him, shouting for help. (Trio: "" – "Do not hope, unless you kill me, that I shall ever let you run away!"). He breaks free and she runs off as the Commendatore enters the garden. The Commendatore blocks Don Giovanni's path and forces him to fight a duel. Don Giovanni kills the Commendatore with his sword and escapes with Leporello. Donna Anna, returning with her fiancé, Don Ottavio, is horrified to see her father lying dead in a pool of his own blood. She makes Don Ottavio swear vengeance against the unknown murderer. (Duet: "" – "Ah, swear to avenge that blood if you can!") A public square outside Don Giovanni's palace Leporello tells Don Giovanni that he (Giovanni) is leading a rotten life; Don Giovanni reacts