B (musical note)

"B (note)" redirects here. For other topics, see B (disambiguation).

"H (musical note)" redirects here. For the musical note B in German notation, see B♭ (musical note).

B, also known as Si, Ti, or, in some European countries, H,^[1] is the seventh note and the twelfth semitone of the fixed-Do solfège. Its enharmonic equivalents are C♭ (C-flat) and A (A-double sharp).

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of Middle B (B₄) is 493.883 Hz.^[2] See musical pitch for a discussion of historical variations in frequency.

Designation by octave

Scientific designation	Helmholtz designation	Octave name	Frequency (Hz)	MIDI note number
B−1	B͵͵͵ or ͵͵͵B or BBBB	Subsubcontra	15.434	11
B0	B͵͵ or ͵͵B or BBB	Subcontra	30.868	23
B1	B͵ or ͵B or BB	Contra	61.735	35
B2	B	Great	123.471	47
B3	b	Small	246.942	59
B4	b′	One-lined	493.883	71
B5	b′′	Two-lined	987.767	83
B6	b′′′	Three-lined	1975.533	95
B7	b′′′′	Four-lined	3951.066	107
B8	b′′′′′	Five-lined	7902.133	119
B9	b′′′′′′	Six-lined	15804.266	N/A
B10	b′′′′′′′	Seven-lined	31608.531	N/A

Scales

Common scales beginning on B

• B major: B C♯ D♯ E F♯ G♯ A♯ B
• B natural minor: B C♯ D E F♯ G A B
• B Harmonic minor: B C♯ D E F♯ G A♯ B
• B Melodic minor ascending: B C♯ D E F♯ G♯ A♯ B
• B melodic minor descending: B A G F♯ E D C♯ 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

• B Ascending melodic minor: B C♯ D E F♯ G♯ A♯ B
• B Dorian ♭2: B C D E F♯ G♯ A B
• B Lydian augmented: B C♯ D♯ E♯ F G♯ A♯ B
• B Lydian dominant: B C♯ D♯ E♯ F♯ G♯ A B
• B Mixolydian ♭6: B C♯ D♯ E F♯ G A B
• B Locrian ♮2: B C♯ D E F G A B
• B Altered: B C D E♭ F G A B

Variation of meaning by geographical region

The referent of the musical note B varies by location.^{[citation needed]} See Musical note § History of note names 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.^{[citation needed]}

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 would be E-flat).^{[citation needed]}

See also

• Piano key frequencies
• B major
• B minor
• Root (chord)