Joseph Lambert Massart (19 July 1811 – 13 February 1892) was a Belgian violinist who has been credited with the origination of the systematic vibrato. He compiled The Art of Working at Kreutzer's Etudes, a supplement that contains 412 fingerings and bowings taken from his time studying with Rodolphe Kreutzer. He was an excellent String quartet player who gave many delightful chamber concerts, having also played Beethoven's Kreutzer Sonata in A minor with Liszt on 23 May 1843.
Massart was born in Liège, and was taught music first by his father Joseph Marie and later by his father's eldest brother Jean-Joseph, a disciple of Gaillard. With the death of his uncle, Massart studied under the guidance of Ambroise Delaveux who then secured for him, from the local authorities of Liège, a scholarship at the Conservatoire de Paris, where his admission was then blocked by Cherubini on the grounds that Massart was a foreigner. He became then the favorite pupil and protégé of Kreutzer and his younger brother, Auguste Kreutzer, who took his brother's post as professor at the conservatory upon his death.
Despite being sponsored by King William I of the Netherlands, he was not accepted at the Conservatoire de Paris until 1829 because of his foreign status. He was appointed professor of violin at the Conservatoire de Paris in 1843 and subsequently taught there for 47 years as music professor. Among his pupils were Fritz Kreisler, Eugène Ysaÿe, Léon Reynier, Henryk Wieniawski, Alfred De Sève, Isidor Lotto, Teresina Tua, and Charles Martin Loeffler.
- Lahee, Henry C. (2006). Famous Violinists of Today and Yesterday. Echo Library. p. 41. ISBN 140-681-422-9.
- Silvela, Zdenko (2001). A New History of Violin Playing: The Vibrato and Lambert Massart's Revolutionary Discovery. Universal-Publishers. p. 161. ISBN 158-112-667-0.
- Annuaire dramatique ...: contenant, pour chaque jour de l'année, des éphémérides dramatiques; le personnel des théatres de la Belgique. Bruxelles 1840-1847. 1840. p. 237. OCLC 183286961
- Cutter, Benjamin: How to Study Kreutzer: A Handbook for the Daily Use of Violin Teachers and Students on the Internet Archive Website