Tremblay studied at the conservatories of Québec in Montréal and Paris (1954–61), where his teachers included Olivier Messiaen (analysis), Andrée Vaurabourg-Honegger (counterpoint), Yvonne Loriod (piano), and Maurice Martenot (inventor of the ondes Martenot).
[1][2] He also attended Stockhausen's summer courses at Darmstadt, where he became interested in electro-acoustic techniques.
He taught musical analysis at the Centre d'arts Orford [fr] and at the Conservatoire de musique du Québec in Quebec City.
[3] Beginning in 1962, and for many years, he taught composition at the Conservatoire de musique du Québec à Montréal.
Among his pupils are Serge Arcuri [fr], Raynald Arseneault, Yves Daoust, François Dompierre, Marc Hyland, Ramon Lazkano, Robin Minard, Éric Morin, Silvio Palmieri, Micheline Coulombe Saint-Marcoux, Isabelle Panneton [fr], André Villeneuve, Claude Vivier, and Wolf Edwards.