N'efu |

French becarre, ọkụ. - square B; lat. na quadratum

Ihe ịrịba ama nke ịjụ mgbanwe nke otu ma ọ bụ ogo ọzọ nke nha. Bekar pụtara ịrịda semitone mgbe ọ dị nkọ ma na-ebuli semitone mgbe ọ gbasịrị larịị, yana ịrịda nzọ ụkwụ ka ọ gbachara okpukpu abụọ ma bulie nzọụkwụ mgbe okpukpu abụọ gachara.

Nlaghachi na ngbanwe dị mfe ma e nwechara okpukpu abụọ (okpukpu abụọ, okpukpu abụọ) ka egosipụtara ugbu a site na otu nkọ na otu larịị, n'otu n'otu (lee mkpụrụedemede Egwu).