A Greek chorus (Ancient Greek: χορός, romanized: chorós) in the context of ancient Greek tragedy, comedy, satyr plays, is a homogeneous group of performers, who comment with a collective voice on the action of the scene they appear in, or provide necessary insight into action which has taken place offstage. Historically, the chorus consisted of between 12 and 50 players, who variously danced, sang or spoke their lines in unison, and sometimes wore masks. The players used masks to change their emotions while they were performing.