He rubbed shoulders and played with the greatest musicians of the time: Hubert Rostaing, Aimé Barelli, Alix Combelle and Henri Crolla.
But it was above all with Jean-Claude Pascal that he wove a long musical career in the 1960s, orchestrating among other things Nous les amoureux, winner of the 1961 Eurovision Song Contest.
In 1939, he participated in the elaboration of the melody of La Mer, but, absent on the day of the presentation at the Raoul Breton [fr] publishing house, it was Albert Lasry, pianist of the editions who co-wrote with Charles Trenet the music for this future international success.
In February 1941, he was part of the Quintette du Hot Club de France that accompanied Charles Trenet on a recording.
At the Liberation of France, Léo Chauliac was part of the Schubert orchestra with André Ekyan, Emmanuel Soudieux [de], Pierre Fouad[3] and Henri Crolla.