As a composer, his works reflect his strong interest in folk music in there structure and melody.
[1] Born in Mattawa, Ontario, Beaulieu began his musical training at the relatively late age of 20, studying piano with Oscar O'Brien and Amédée Tremblay in Ottawa.
With Marchand he traveled throughout the provinces of Ontario and Quebec giving concerts of folk music.
After the conservatory closed in 1937, he joined the faculty of the University of Ottawa where he taught courses in piano, singing, and business.
He published several books of Canadian folk song collections, including Chantez, les petits (Thompson 1960), the eight-volume series Mon école chante (La Bonne Chanson 1956–64), Gerbes de chansons nouvelles and Chantez petits et grands.