Mathieu began studying classical piano at the age of three. Introduced to traditional music in 2015, he began training in accompaniment with Rachel Aucoin before discovering the diatonic accordion through Sabin Jacques. Just a few years later, Mathieu began performing on stage at concerts and traditional dance evenings, opening the door to numerous artistic collaborations. In 2018, he co-founded La Déferlance, which also sparked a love for traditional song. The project gave him the opportunity to explore songwriting and melody composition as well. Drawing on his musical background, he has been invited to teach on various occasions in Quebec and the United States, including at Ashokan Northern Week and Danse-Neige.

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For nearly 10 years, Mathieu has served on the board of directors of Maréemusique, an organization behind several flagship events in Quebec’s traditional music scene, including the Souches à Oreilles camp and the Lévis symposium. He now serves as the organization’s president.​ Alongside his involvement in the traditional music community, Mathieu holds a master’s degree in statistics and is responsible for survey methodology at the Institut de la statistique du Québec.
 

Marie-Desneiges began learning the accordion at the age of seven with Suzie Gagnon (Cirque du Soleil). As an adult, she continued to hone her craft with a number of renowned musicians, including Sabin Jacques, Denis Pépin, Yves Hélie, and Normand Miron. She has performed on stage alongside artists such as Simon-Charles Cyr, Rachel Aucoin, and Gaëtan Lefebvre, and has appeared as a soloist at events including the Carrefour mondial de l’accordéon, the Festival celtique de Québec, Rendez-vous ès Trad, the Québec Winter Carnival, and Printemps de la musique. Since 2018, Marie-Desneiges has devoted most of her musical activities to La Déferlance, of which she is a founding member. She has also developed extensive experience in music facilitation and teaching through organizations and events such as École de musique Denys-Arcand, Danse-Neige, and de Souches à Oreilles.

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Alongside her musical career, Marie-Desneiges works as an educational advisor in university pedagogy at the Faculty of Business Administration at Université Laval.


 

Grégoire began making music at the age of three and first picked up the violin at four. From 1986 to 1997, he studied violin and piano at the Conservatoire de musique de Québec. Over the years, he broadened his musical palette by adding guitar, mandolin, and bass to his repertoire. At the age of 14, he was introduced to traditional music by renowned Quebec City accordionist Adélard Thomassin, who connected him with other talented musicians from the region, including Denis Maheux and Jean-Yves Hamel. He went on to perform with various ensembles alongside Thomassin during numerous tours across Europe, the United States, and Canada.

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Since 1998, Grégoire has been a member and musical director of the Irish music group Rosheen. Throughout his professional career, he has also regularly accompanied a wide range of artists, including Patrick Groulx—with whom he won a Félix Award for Country Album of the Year in 2010—Nathalie Choquette, and Étienne Drapeau, in addition to collaborating occasionally with many other artists from Quebec’s entertainment scene. Driven by a desire to reconnect with his musical roots, he joined La Déferlance in 2023.

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For many years, Grégoire has also worked as a professional piano tuner for educational institutions, festivals, performance venues, and private clients.