He then qualified for the chorus and opera school of the Teatro Argentino de La Plata, where he graduated from being a super to singing baritone roles; he also learned stage managing.
He has been described as difficult to work with and who "admits his intense management and directing style was at times hard on his singers and staff: 'I am obsessed with something that does not exist: perfection.
[2] Capobianco became one of the City Opera's important directors, mounting ground-breaking productions including Alberto Ginastera's Don Rodrigo (with Plácido Domingo); Giulio Cesare (which brought Sills to preëminence in 1966); Le Coq d'Or; Manon; Mefistofele (with Norman Treigle in his greatest role); Lucia di Lammermoor; Les contes d'Hoffmann; I puritani; Il turco in Italia; and the world premiere of Menotti's La Loca.
In addition, he produced the now-famous "The Three Queens" operas of Donizetti, Roberto Devereux (1970), Maria Stuarda (1972), and Anna Bolena, all of which starred Sills.
[8] One of the features of his tenure at the company was the introduction of a Verdi Festival, with two operas presented each summer, one generally a late composition, the other an early work from the composer's "galley years".
Capobianco left the company in 1983, but his successor was able to present I masnadieri (with Sutherland) along with Simon Boccanegra while the festival concept ended in March 1985 with Oberto (with Ferruccio Furlanetto and Susanne Marsee).
"[This quote needs a citation] Capobianco made his Metropolitan Opera debut in 1978 with Thaïs, featuring Sills, and returned to that theatre for Simon Boccanegra in 1984, with Sherrill Milnes in the title role.