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Sharp (music)

From Wikipedia, the free encyclopedia
For the use of the sharp sign in mathematics, see Musical isomorphism. For the use of the sharp sign in computational complexity theory, see ♯P.
"♯" redirects here. Not to be confused with the number sign (#).
For the Japanese electronics company, see Sharp Corporation.
♯
Sharp (music)
In UnicodeU+266F ♯ MUSIC SHARP SIGN (♯)
Different from
Different fromU+0023 # NUMBER SIGN
U+2317 ⌗ VIEWDATA SQUARE
U+22D5 ⋕ EQUAL AND PARALLEL TO
U+4E95 井 CJK UNIFIED IDEOGRAPH-4E95 (Jingtian)
Related
See alsoU+266D ♭ MUSIC FLAT SIGN

In music, sharp – eqv. dièse (from French) or diesis (from Greek δίεσις)[a] – means higher in pitch. The sharp symbol, ♯, indicates that the note to which the symbol is applied is played one semitone higher. The opposite of sharp is flat, indicating a lowering of pitch. The ♯ symbol derives from a square form of the letter b (see History of notation of accidentals for more information).

Examples

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The sharp symbol is used in key signatures or as an accidental applied to a single note. The staff below has a key signature with three sharps (A major or its relative minor, F♯ minor). The sharp symbol placed on the note indicates that it is an A♯ instead of an A♮.

{ \omit Score.TimeSignature \relative c'' { \key a \major ais1 } }

In twelve-tone equal temperament tuning (the predominant system of tuning in Western music), raising a note's pitch by a semitone results in a note that is enharmonically equivalent to another named note. For example, A♯ and B♭ would be equivalent. This is not the case in most non-standard tuning systems.

Variants

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A double sharp (double sharp) is indicated by the symbol double sharp and raises a note by two chromatic semitones. Historically, a double sharp was sometimes written , or .[1]

{ \omit Score.TimeSignature \relative c'' { bisis1 } }

A half sharp, or demisharp (half sharp) raises a note by approximately a quarter tone. A sharp-and-a-half, three-quarter-tone sharp, or sesquisharp (three quarter sharp) raises a note by three quarter tones.

{ \omit Score.TimeSignature \relative c'' { dih1 eisih } }

A triple sharp (triple sharp or double sharp♯) is extremely rare. It would raise a note by three semitones (a whole tone plus a semitone).[2][3] The Btriple sharp below would be enharmonic with D natural.

{ \omit Score.TimeSignature \relative c'' { \tweak Accidental.stencil #ly:text-interface::print \tweak Accidental.text \markup { \concat { \sharp \doublesharp}} bis1 } }

Key signature

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{ \omit Score.TimeSignature { \key cis \major s16^"" } }
The standard order in which sharps occur in a key signature is "F♯ C♯ G♯ D♯ A♯ E♯ B♯", with a maximum of 7.

In a key signature, sharps or flats are placed to the right of the clef. The pitches indicated apply in every measure and octave.

Number

of sharps

Major key Sharp notes Minor key
0 C major – A minor
1 G major F♯ E minor
2 D major F♯, C♯ B minor
3 A major F♯, C♯, G♯ F♯ minor
4 E major F♯, C♯, G♯, D♯ C♯ minor
5 B major F♯, C♯, G♯, D♯, A♯ G♯ minor
6 F♯ major F♯, C♯, G♯, D♯, A♯, E♯ D♯ minor
7 C♯ major F♯, C♯, G♯, D♯, A♯, E♯, B♯ A♯ minor

The order of sharps in key signatures is F♯, C♯, G♯, D♯, A♯, E♯, B♯. Starting with no sharps or flats (C major), adding the first sharp (F♯) indicates G major, adding the next (C♯) indicates D major, and so on through the circle of fifths.

Some keys (such as C♯ major with seven sharps) may be written as an enharmonically equivalent key (D♭ major with five flats in this case). In rare cases, the sharp keys may be extended further, G♯ → D♯ → A♯ → E♯ → B♯ → Fdouble sharp → Cdouble sharp, requiring double sharps in the key signature: Fdouble sharp, Cdouble sharp, Gdouble sharp, Ddouble sharp, Adouble sharp, Edouble sharp, Bdouble sharp.

Accidental

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When used as an accidental, the sharp sign applies to the note on which it is placed, and to subsequent similar notes in the same measure and octave. In modern notation accidentals do not apply to notes in other octaves, but this was not always the convention.

{ \omit Score.TimeSignature \relative c'' { bis1 } }

If a sharp is used as an accidental, it can be cancelled on a subsequent similar note in the staff, measure and octave by using a flat (♭) or a natural (♮).

{ \omit Score.TimeSignature \key c \major \time 4/4 bis'2 bes' bis' b'}

Unicode

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In Unicode, assigned sharp signs are as follows:

  • U+266F ♯ MUSIC SHARP SIGN (♯)
  • U+1D12A 𝄪 MUSICAL SYMBOL DOUBLE SHARP
  • U+1D130 𝄰 MUSICAL SYMBOL SHARP UP
  • U+1D131 𝄱 MUSICAL SYMBOL SHARP DOWN
  • U+1D132 𝄲 MUSICAL SYMBOL QUARTER TONE SHARP

Other notation and usage

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  • The sharp symbol (♯) resembles the number (hash) sign (#), in that both have two intersecting sets of parallel double lines. While the number sign may have a pair of horizontal lines, the sharp sign has a pair of slanted lines that rise from left to right instead, to avoid obscuring the staff lines. The other set of parallel lines are vertical in the sharp sign, while the number sign (#) may have slanted lines instead.[citation needed] It is also etymologically independent from the number sign. Likewise, while the double-sharp sign double sharp resembles a bold-face lower-case x it needs to be typographically distinct.
  • Historically, lowering a double sharp to a single sharp could be notated using a natural and sharp sign (♮♯) or vice-versa (♯♮) instead of the conventional sharp sign (♯), but the natural sign is often omitted in modern notation. The same principle applies when canceling a triple sharp.[4] The combination ♮♯ can be also written when changing a flat to a sharp.[5]
{ \omit Score.TimeSignature \relative c'' { bisis2 bis \accidentalStyle modern bisis2 bis } }
  • In environments where the double sharp symbol is not supported a double sharp can be written using two single sharp signs (♯♯), hash signs (##) or a lower-case letter x. Likewise, a triple sharp can be written as ♯♯♯.[citation needed]

See also

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Notes

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  1. ^ For the etymology of the words dièse, diesis, and δίεσις, see diesis.

References

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  1. ^ Chisholm, Hugh, ed. (1911). "Musical Notation" . Encyclopædia Britannica. Vol. 19 (11th ed.). Cambridge University Press. p. 87.
  2. ^ Ayrton, William (1827). The Harmonicon. Vol. V. Samuel Leigh. p. 47. ISBN 1276309457.
  3. ^ Byrd, Donald (2018). "Extremes of conventional music notation" (academic pers. page). Bloomington, IN: University of Indiana.
  4. ^ Max Reger: Clarinet Sonata No.2 (Complete Score), pp. 33.: Scores at the International Music Score Library Project
  5. ^ Chopin: Études No. 9, Op.10 (C.F. Peters), pp. 429.: Scores at the International Music Score Library Project
  6. ^ Fonville, J. (Summer 1991). "Ben Johnston's extended just intonation – a guide for interpreters". Perspectives of New Music. 29 (2): 106–137, esp. 109. doi:10.2307/833435. JSTOR 833435. ... the ⁠25/ 24 ⁠ ratio is the sharp (♯) ratio ... this raises a note approximately 70.6 cents.
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