A backing band or backup band is a band which accompanies an artist at a live performance or on a recording. This can either be an established group or an ad hoc group assembled for the purpose. Such groups are often made up of session musicians. In music, a band is a company of musicians, or musical ensemble, usually popular or folk, playing parts of or improvising a musical arrangement on different musical instruments. ... Ad hoc is a Latin phrase which means for this [purpose]. It generally signifies a solution that has been tailored to a specific purpose, such as a tailor-made suit, a handcrafted network protocol, and specific-purpose equation and things like that. ... Session musicians are musicians available for hire, as opposed to musicians who are either permanent members of a musical outfit or who have acquired fame in their own right. ...