A crucial aspect of the spartito is how Monteverdi handles the word pianto (weeping). Look for the suspensions and passing tones here. In the true seconda pratica , dissonance is used to depict pain. You might find a suspension on the second syllable of dolcissimo , creating a clash that resolves into sweetness. This musical "tear" falling into resolution is the moment where the piece transcends mere song and becomes art.
When you open the score, you are immediately struck by the economy of means. Monteverdi was a master of saying much with little. d'amor pane dolcissimo spartito