Twenty Studies R. Kreutzer arranged by Jacques Delécluse (born 1933) is a set of twenty studies written for Xylophone . Inspired by a set of exercises for Strings written by Kreutzer, Twenty Studies after R. Kreutzer coverspassages that would often be seen in modern orchestral music. Rudolphe Kreutzer was a French violinist, conductor and composer, and the author Jacques Delécluse, is a soloist at the Paris Orchestra and a professor at the ParisConservatoire. He has conceived a keyboard-percussion instrument that holds his name, and is also the author of a series of seven books _x001A_A la maniere de_x001A_ for Drums and Piano.