Belgian born, Louis Julien Vannetelbosch (b. 1920) is an established composer, conductor and Trumpet player. His expertise combined have led him to publish 25 successful studies for Trumpet, the majority of which have been compiled in Twenty Melodic and Technical Studies.

Vannetelbosch studied at the Leuven and Brussels Conservatoires where he won many prizes. His professional career gained him success with many orchestras and he later went on to conduct and judge competitions.

Vannetelbosch's Twenty Melodic and Technical Studies for Trumpet are in a variety of styles, and address aspects including rhythm, time signatures, breath control, tonality, tempo, range, dynamics, articulation, phrasing, and ornamentation, among many other musical elements. For all advanced trumpeters, Twenty Melodic and Technical Studies, compiled by Louis Julien Vannetelbosch, a master of the instrument himself, is essential to aid progression to a high technical standard.