But the preface of his 8th Book of Madrigals (1638) seems to be virtually a fragment of it. Therein Monteverdi claims to have invented a new “agitated” style (Genere concitato, later called Stile concitato) to make the music "complete/perfect" ("perfetto").
But what seems to be a snippet from his 8th Book of Madrigals (1638) is actually an excerpt from it. In this passage, Monteverdi claims to have created a novel “agitated” style (Genere concitato, later referred to as Stile concitato) in order to render the music "complete/perfect" ("perfetto").