Chamber Music (20th Century)
All chamber genres from the Classical era to this point were still valid.
Two new notable chamber genres:
Brass quintet
A quintet made up of two trumpets, one horn, one trombone, and one tuba.
Pierrot ensemble
A chamber music group made up of one flute, one clarinet, one violin, one cello, and one piano. Sometimes a vocalist or a percussionist was added to the group.