The song "Outono" by Vivaldi is originally in the key of F major and is part of his famous set of violin concertos known as "The Four Seasons." It was composed in the early 18th century and remains one of Vivaldi's most well-known and celebrated works. The piece is often performed by various orchestras and solo violinists, showcasing the virtuosity and beauty of the composition. As a trivia, "Outono" is the Portuguese word for "Autumn," and the music beautifully captures the essence of this season with its colorful and vibrant melodies. The melody of the song is characterized by its lively and energetic passages, depicting the swirling leaves, the crisp autumn breeze, and the sense of change and transition.