B (musical note)

B, also known as Si, Ti, or, in some European countries, H, is the seventh note of the fixed-Do solfège. Its enharmonic equivalents are C and A.

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of Middle B (B4) is approximately 493.883 Hz. See pitch (music) for a discussion of historical variations in frequency.

Designation by octave

Scientific designation Helmholtz designation Octave name Frequency (Hz)
B1B͵͵͵ or ͵͵͵B or BBBBSubsubcontra15.434
B0B͵͵ or ͵͵B or BBBSubcontra30.868
B1B͵ or ͵B or BBContra61.735
B2BGreat123.471
B3bSmall246.942
B4bOne-lined493.883
B5bTwo-lined987.767
B6bThree-lined1975.533
B7bFour-lined3951.066
B8bFive-lined7902.133
B9bSix-lined15804.266
B10bSeven-lined31608.531

Scales

Common scales beginning on B

Diatonic scales

  • B Ionian: B C D E F G A B
  • B Dorian: B C D E F G A B
  • B Phrygian: B C D E F G A B
  • B Lydian: B C D E F G A B
  • B Mixolydian: B C D E F G A B
  • B Aeolian: B C D E F G A B
  • B Locrian: B C D E F G A B

Jazz melodic minor

Variation of meaning by geographical region

The referent of the musical note B varies by location. See note for a discussion on other differences in letter naming of the notes.

In the United States, Canada, Australia, the United Kingdom, the Republic of Ireland, and the Netherlands, as described above, B usually refers to the note a semitone below C, while B-flat refers to the note a whole tone below C.

However, in Germany, Central and Eastern Europe, and Scandinavia, the label B is sometimes used for what, above, is called B-flat, and the note a semitone below C is called H. This makes possible certain spellings which are otherwise impossible, such as the BACH motif and the DSCH motif (the latter of which also uses the "S" name for what in Anglophone and Dutch notation would be E-flat).

See also

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