With bebop, jazz shifted to the paradigm still in place today: a subcultural art music played primarily by small combos in a jam-session format, favoring solo improvisation and aimed at a specialized market of aficionados.
A conductor is a person who stands in front of an orchestra or choir and directs its performance. On a bus, the conductor is the person whose job is to sell tickets to the passengers. On a train, a conductor is a person whose job is to travel on the train in order to help passengers and check tickets.
Orchestra definition, a group of performers on various musical instruments, including especially stringed instruments of the viol class, clarinets and flutes, cornets and trombones, drums, and cymbals, for playing music, as symphonies, operas, popular music, or other compositions. See more.