A play is a complicated assembly composed of 3 components: "scenes composed only of a Noh chant," "scenes during which both a Noh chant and the musician's performance," "scenes with only musician's performance (with the protagonist (shite) dancing in most cases)."
一曲のうちには、「謡のみによって構成される場面」「謡と囃子がともに奏される場面」「囃子のみが奏される場面（たいていの場合、これはシテの舞である）」の3つが複雑に入り組んでいる。