Gypsy swing is an outgrowth of the jazz violin swing of Joe Venuti and Eddie Lang. In Europe it was heard in the music of guitarist Django Reinhardt and violinist Stéphane Grappelli. Their repertoire overlaps 1930s swing, including French popular music, gypsy songs, and compositions by Reinhardt, but gypsy swing bands are formulated differently. There is no brass or percussion; guitars and bass form the backbone, with violin, accordion, clarinet or guitar taking the lead. Gypsy swing groups generally have no more than five players. Although they originated in different continents, similarities have often been noted between gypsy swing and Western swing]l, leading to various fusions.