A recital is a performance of music, usually featuring one or more soloists. The term 'recital numbers' refers to the pieces of music performed during a recital. These pieces can include sonatas, which are multi-movement works for a solo instrument or a small ensemble; pieces, which are shorter works for a solo instrument or a small ensemble; SOLI, which are pieces for one or more soloists; duets, which are pieces for two performers; and solos, which are pieces for one performer.