The oboe is a double-reed woodwind instrument. Though the term is usually taken to mean the regular oboe, there are many other instruments in the oboe family (such as the heckelphone, bass oboe, cor anglais, oboe d'amore, and piccolo oboe). Oboes are conical, with a flared bell, traditionally made of wood, and featuring a system of metal keys. Their sound is very distinctive and because of it, the oboe has a place as a member of the standard symphony orchestra. It also features in chamber music, jazz, and folk music, and has a considerable solo and concert repertoire.