It was there in the early 1960s that he developed an interest in the avant-garde art and music that would soon lead to him studying in Europe with Karlheinz Stockhausen and Pierre Boulez.
Against the background of military dictatorship, Duprat met the leaders of Tropicália: Caetano Veloso and Gilberto Gil.
He found himself instantly drawn to the movement by their determination to absorb universal culture and revolutionize Brazilian music.
Duprat's arrangements received much praise over the years, and he became known as the "George Martin of Tropicalia" and the "Brian Wilson of Brazil".
In later years, Duprat spent time writing jingles but was slowly forced to withdraw from his artistic activities due to hearing problems.