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? although 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 (or enharmonically C?). 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 Bilinear music notation Octave name Frequency (Hz)
B?-1 B? or B? or BBBB? (-uB?) Subsubcontra 14.568
B?0 B? or B? or BBB? (-vB?) Subcontra 29.135
B?1 B?? or ?B? or BB? (-wB?) Contra 58.270
B?2 B? (-xB?) Great 116.541
B?3 b? (-yB?) Small 233.082
B?4 b?? (zB?) One-lined 466.164
B?5 b? (yB?) Two-lined 932.328
B?6 b? (xB?) Three-lined 1864.655
B?7 b?? (wB?) Four-lined 3729.310
B?8 b? (vB?) Five-lined 7458.620
B?9 b? (uB?) Six-lined 14917.240
B?10 b?? (tB?) Seven-lined 29834.481


Common scales beginning on B?

Diatonic scales

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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