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B (B-flat; also called si bémol) is the eleventh semitone of the Western chromatic scale (starting from C). thumb It lies a diatonic semitone above A and a chromatic semitone below B, thus being enharmonic to although in some musical tunings, B will have a different sounding pitch than A. 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== ) || Five-lined ||align="right" | 7458.620 |- |B9 || b′′′′′′ || (uB) || Six-lined ||align="right" | 14917.240 |- |B10 || b′′′′′′′ || (tB) || Seven-lined ||align="right" | 29834.481 |} 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「B♭ (musical note)」の詳細全文を読む スポンサード リンク
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