Born in Étampes, Trouard had André Bloch, Joseph Morpain, Victor Staub, Emil von Sauer, Marcel Dupré, Paul Dukas, Philippe Gaubert and Bruno Walter as teachers at the Conservatoire de Paris.
He perfected his musical studies with Yves Nat, Sergueï Rachmaninov, Manuel Infante, and Maurice Ravel.
He played in recital and with orchestra under the direction of the greatest conductors: Philippe Gaubert, Pierre Monteux, Eugène Bigot, André Cluytens, Pierre Dervaux, Richard Beck [fr], Carl Schuricht.
He excelled in Liszt whose technique and spirit he possessed through his relationship with Emil von Sauer.
[4] In 1953, he took part in the short film Trois hommes et un piano [fr] by André Berthomieu, in which he played three pieces of classical music as well as C'est si bon with Henri Betti and Léo Chauliac.