The son of a vine-grower, destined for the ecclesiastical state by his parents, Bernard Jumentier entered the seminary of Chartres to attend his studies. More interested in music than in orders, he has been placed according to his wish in the mastership of the Chartres Cathedral, under the direction of Michel Delalande, master of music of this church since 1761. It is therefore in this capacity of "choir boy" that he learned singing, and more generally the main musical disciplines, harmony, counterpoint and musical composition. He was also trained to play the pipe organ and the harpsichord. He was only eighteen years old, in 1767, when he became a music master at Senlis before returning to Notre-Dame de Chartres, as early as 1768, as cantor. He later served in Saint-Malo and subsequently in the Coutances Cathedral. At the end of 1776 he was appointed chapel-master of the collégiale et royale de Saint-Quentin. He remained in control until his death in 1829, despite an interruption of about ten years, due to the French Revolution. In 1783 he wrote his Traité du chant. A follower of Jean-Philippe Rameau and Christoph Willibald Gluck, from 1783 to 1787, he presented some of his motets, in the chapel of Louis XVI at Versailles, and at the Notre Dame of Paris cathedral. They were appreciated, but the progression of his career was brutally prevented by the Revolution of 1789. In 1783, in Paris, the Concert Spirituel of the Palais des Tuileries gave a great chorus motet of Jumentier, whose title we do not know. In 1793, when the belongings of the Cathedral chapter of Saint-Quentin were confiscated and the choir house seized and then sold as bien national, he found himself, if not without resources and without asylum, at least somewhat seriously destitute. Jumentier had to live to a large extent on private lessons he gave. During the Revolution he also wrote a historical opera, Chloris et Médor, and some patriotic romances. In 1802, at the reopening of the churches, he resumed, at first gratuitously, the instruction of choir-children. He was able to direct them until 1825. It is also known that one of his masses was given with great success in 1812, at the Saint-Eustache church in Paris, under the direction of Rodolphe Kreutzer. Jumentier composed a large number of pieces of sacred music and a little secular music. What remains of his original manuscripts is preserved in the library of Saint-Quentin. His Requiem mass was played at his burial. There are handwritten copies of some of his compositions in the Bibliothèque nationale de France, in the fund of the Conservatoire de Paris. He was the owner of the Stehlin harpsichord dated 1750, given in legacy and exhibited at the of Saint-Quentin, an eminent example of the great French craft of the 18th century.
