chamber music, Kammermusik [G], musique de chambre [F], musica da camera [I], musica cameralis [L]—"Classical Music" for a small ensemble, generally 8 or fewer players with a canonical emphasis on 3-6 players. explore
duo, duet, dueto [S], duetto [I], duett [G]—a work for two instruments; the ensemble itself
passacaglia, passacaille [F], pasacalle [S]—A variation form based on a recurring bass line or chord progression closely related to the chaconne. Of Spanish origin first appearing in the early 17th century. Some generalizations suggest a grave character, a minor key and a triple meter. wiki