In 1957 jazz trumpeter Dizzy Gillespie criticized the continued lack of respect in America for jazz as more than a lowbrow entertainment. Gillespie's criticism came surprisingly at a time when jazz was enjoying a resurgence in national recognition as well as a booming commercial market in recordings and live performances. It was in fact the peak of a renaissance in jazz music – a rebirth of jazz as a high art movement that over the two decades of the 1950s and 1960s transformed American music. Inspired in the 1940s by a new style of jazz called bebop, musicians during the renaissance explored various styles of jazz performance, composition, and improvisation.