[1] He studied in Parma, and made his debut in Pesaro, as Figaro, in 1948.
[1] He sang widely in Italy and Europe in the standard Italian repertory, and was described in 1972 by Italian music critic as "one of the most reliable baritone in the business".
[1] In 1956, Protti appeared with the New York City Opera, in Rigoletto (with Norman Treigle as Sparafucile), Tosca (in Vladimir Rosing's staging), and the company premiere of Il trovatore (with Pier Miranda Ferraro).
[1] He made a belated debut at the Metropolitan Opera, as Rigoletto, in John Dexter's production, in 1985, at the age of sixty-five.
[1] Aldo Protti died in Cremona on 10 August 1995, aged seventy-five.