B♭ (musical note)

B Flat

B♭ (B-flat; also called si bémol) is the first note of the B♭ minor scale. It is also enharmonic to A-sharp.

Designation by octave

Scientific designation Helmholtz designation Octave name Frequency (Hz)
B♭−1B♭͵͵͵ or ͵͵͵B♭ or BBBB♭Subsubcontra14.568
B♭0B♭͵͵ or ͵͵B♭ or BBB♭Subcontra29.135
B♭1B♭͵ or ͵B♭ or BB♭Contra58.27
B♭2B♭Great116.541
B♭3b♭Small233.082
B♭4b♭′One-lined466.164
B♭5b♭′′Two-lined932.328
B♭6b♭′′′Three-lined1864.655
B♭7b♭′′′′Four-lined3729.31
B♭8b♭′′′′′Five-lined7458.62
B♭9b♭′′′′′′Six-lined14917.24
B♭10b♭′′′′′′′Seven-lined29834.481

Common scales beginning on B♭

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