Louis Aubert was a child prodigy. His parents, recognizing their son's musical talent, sent him to Paris to receive an education at an early age. He became recognized for his voice, primarily for his renditions of the Pie Jesu from Gabriel Fauré's Requiem at the Église de la Madeleine. The young Aubert met Fauré at the Paris Conservatoire, and he regularly attended at his composition classes, which greatly influenced his development.
Aubert became an excellent pianist. In 1911 he premiered Maurice Ravel's Valses nobles et sentimentales, which were written for and dedicated to him. He also worked as a piano and composition teacher, both privately and on the faculty of the Conservatoire de Paris. He counts among his students Henry Barraud, Jean-Marie Beaudet, Jean Berger, and Georges Savaria.
He composed music for the church, several ballets, mélodies, and incidental music for the stage. Although Breton by birth at a time of intense Breton nationalism, he was little inspired by his home region. Aubert wrote popular songs, notably for Marie Dubas. He also was a contributing journalist to the magazines Chantecler, Paris-soir, Le journal and Opéra.
Aubert wrote one opera in three acts based on classic fairy tales by Charles Perrault to a libretto by J. Chenevière entitled La fôret bleu ("The Blue Forest"). The work was composed in 1904 to 1911 and individual acts were performed while the work was in progress. The first complete staged performance took place in Geneva on 7 January 1913. The enchanting characters and delightful plot enabled the work to achieve popular success in other theaters, including Boston later the same year. The work did not appear in Paris until 1924, where it was staged at the Opéra-Comique (Salle Favart). The opera was recorded for French Radio in 1954 conducted by Eugène Bigot, with Raymond Malvasio, Marthe Angelici, Claudine Collart, Jacqueline Brumaire, Louis Noguera and Lucien Lovano in the cast.
Aubert died in near-oblivion in Paris at age 90.
- L'Orchestre, Paris, PUF, 1951.
- Notice sur la vie et les travaux de Gustave Charpentier, Paris, Firmin-Didot, 1956.
- Sadie, Stanley (Ed.)  (1994). The New Grove Dictionary of Opera, vol. 1, A-D, chpt: "Aubert, Louis(-François-Marie)" by Richard Langham Smith, New York: MacMillan. ISBN 0-935859-92-6.
- Louis Vuillemin, L. Aubert et son œuvre, Paris, Durand, 1921.
- R. Bernard, « L. Aubert » in La revue musicale, VIII, 1927.
- Article dans le mensuel La Bretagne à Paris, June 1956.
- Jankélévitch, Vladimir (1995), Ravel, Solfèges (nouv. ed.), Paris: Seuil, ISBN 2-02-023490-4, OCLC 33209653 LCC ML410.R23 J2 1995
- H. Corbes, « Louis Aubert compositeur malouin » in Bulletin de la société d'histoire et d'archéologie de Saint-Malo, 1981.
- Bade, Patrick. Rarissima - rescued by the internet. Classical Recordings Quarterly, Autumn 2014, No 78, p4.
- Louis Aubert (1877-1968) (includes list of main works)
- Free scores by Louis Aubert at the International Music Score Library Project