Editing Sharp (music) (section)

== Variants ==
A '''double sharp''' is indicated by the symbol {{music|x}} and raises a note by two [[semitone]]s (a whole tone). Double sharps were sometimes written [[File:EB1911 - Musical Notation - double sharp 1.png|13px]], [[File:EB1911 - Musical Notation - double sharp 2.png|18px]]  or [[File:EB1911 - Musical Notation - double sharp 3.png|16px]].<ref>
{{cite EB1911|wstitle=Musical Notation|volume=19|page=87}}
</ref>
:<score> { \omit Score.TimeSignature \relative c'' { bisis1 } }</score>

A '''half sharp''' or '''demisharp''' ({{music|t}}) raises a note by approximately a [[quarter tone]]. A '''sharp-and-a-half''', '''three-quarter-tone sharp''' or '''sesquisharp''' ({{music|#t}}) raises a note by three quarter tones.

:<score>{
\omit Score.TimeSignature \relative c'' { dih1 eisih } }</score>

A '''triple sharp''' (♯{{music|x}} or {{music|x}}♯) is extremely rare. It would raise a note by three semitones (a whole tone plus a semitone).<ref name=":0">
{{cite book |last=Ayrton |first=William |url=https://books.google.com/books?id=88IJAQAAMAAJ&q=%22double+sharp+major%22+scale&pg=PA47 |title=The Harmonicon |publisher=Samuel Leigh |year=1827 |isbn=1276309457 |volume=V |page=47}}
</ref><ref name=":1">
{{cite web |last=Byrd |first=Donald |year=2018 |title=Extremes of conventional music notation |url=https://homes.luddy.indiana.edu/donbyrd/CMNExtremes.htm |publisher=[[University of Indiana]] |place=Bloomington, IN |type=academic pers. page}}
</ref> The B♯{{music|x}} below would be [[enharmonic]] with D natural.
:<score> { \omit Score.TimeSignature \relative c'' {
  \tweak Accidental.stencil #ly:text-interface::print \tweak Accidental.text \markup { \concat { \sharp \doublesharp}} bis1
} }</score><ref name=":0" /><ref name=":1" />

While this system allows for higher multiples of sharps, triple sharps are the practical limit, and there are only a few examples in the literature. In other tuning systems, such as [[53 equal temperament]], '''quadruple sharps''' or beyond may be required. A quadruple sharp would be indicated by the symbol {{music|x}}{{music|x}}.{{Citation needed|date=May 2025}}
:<score>{
\omit Score.TimeSignature \relative c'' {
  \tweak Accidental.stencil #ly:text-interface::print \tweak Accidental.text \markup { \concat { \doublesharp \doublesharp }}beses1
} }</score>{{Citation needed|date=May 2025}}