Studies on Zacara's music are all relatively recent, and much remains to be solved in terms of chronology and attribution. He seems to have been active as a composer throughout his life, and a stylistic development is evident, with two general phases taking shape: an early period, dominated by song forms such as the ballata, similar in style to the work of Jacopo da Bologna or Francesco Landini; and a period possibly beginning around 1400, when he was in Rome, during which his music is influenced by the "ars subtilior".