サン・ジョバンニ・イン・ラテラノ大聖堂
Born in Rome, Capocci received training in organ and harmony from his father Gaetano (1811-1898) and in 1861 he received a piano diploma from the Accademia di Santa Cecilia in Rome. In 1875, he was appointed organist of the Archbasilica of St. John Lateran. In 1898, he succeeded his father as choirmaster at the Basilica. He also served in the Roman churches of St. Ignatius and St. Mary of Montserrat.