Baroque Period During the Baroque period of orchestral music, the leader of the group was usually the harpsichordist or violinist in the group. Baroque musicians also had a lot of work to complete. For ex. Composing new music for weekly concerts, and rehearsing and managing the orchestra,they also had to take care of the instruments and the music library. Antonio Vivaldi was a young violinist, around the? age of 15 he wrote his first opera Ottone in Vila. People love Vivaldi’s works. Vivaldi composed a few more opera but people did not like them. Vivaldi is known for his orchestral works the Four Seasons.