A concert is a live performance, in front of an audience. The performance may be by a single musician, or by a musical ensemble, such as an orchestra, choir, or band. Concerts are held in a wide variety and size of Venue, from private houses or small nightclubs, dedicated concert halls, arenas and parks to large multipurpose buildings, and even sports stadiums. Indoor concerts held are sometimes called arena concerts or amphitheatre concerts. Informal names for a concert include show and gig.
Regardless of the venue, musicians usually perform on a stage (if not actual then an area of the floor designated as such). Concerts often require live event support with professional audio equipment. Before recorded music, concerts provided the main opportunity to hear musicians play.