B%E2%99%AD (musical Note)
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B%E2%99%AD Musical Note

B (B-flat; also called si bémol) is the eleventh step of the Western chromatic scale (starting from C). It lies a diatonic semitone above A and a chromatic semitone below B, thus being enharmonic to A, even though in some musical tunings, B will have a different sounding pitch than A. B-flat is also enharmonic to Cdouble flat.

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the B above middle C is approximately 466.164 Hz. See pitch (music) for a discussion of historical variations in frequency.

While orchestras tune to an A provided by the oboist, wind ensembles usually tune to a B-flat provided by a tuba, horn, or clarinet.

In Germany, Russia, Poland and Scandinavia, this pitch is designated B, with 'H' used to designate the B-natural. Since the 1990s, B-flat is often denoted Bb or "Bess" instead of B in Swedish music textbooks. Natural B is called B by Swedish jazz and pop musicians, but still denoted H in classical music. See B (musical note) for an explanation.

Designation by octave

Scientific designation Helmholtz designation Octave name Frequency (Hz)
B-1 B or B or BBBB Subsubcontra 14.568
B0 B or B or BBB Subcontra 29.135
B1 B? or ?B or BB Contra 58.270
B2 B Great 116.541
B3 b Small 233.082
B4 b One-lined 466.164
B5 b′′ Two-lined 932.328
B6 b′′′ Three-lined 1864.655
B7 b′′′′ Four-lined 3729.310
B8 b′′′′′ Five-lined 7458.620
B9 b′′′′′′ Six-lined 14917.240
B10 b′′′′′′′ Seven-lined 29834.481


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

See also

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



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