Editing Accidental (music) (section)

==Double flats and sharps==
{{Image frame|content=<score> {
\override Score.TimeSignature
#'stencil = ##f
    \relative c'' {
        \time 4/4
        aeses1 aisis
    }  }
</score>|width=180|caption=The two double accidentals. From left to right: [[double flat]] and [[double sharp]].}}
A [[double flat]] or [[double sharp]] would alter the pitch of a note by two semitones.<ref>Bruce Benward & Marilyn Nadine Saker, ''Music in Theory and Practice'', seventh edition (Boston: McGraw-Hill, 2003): vol&nbsp;1, p.&nbsp;6.<br />"''Double Sharp'' ({{music|x}})—raises the pitch two half steps. Double flat ({{music|bb}})—lowers the pitch two half steps."</ref> An F double sharp is a [[whole step]] above an F, making it [[enharmonic]]ally equivalent to a G. These alterations apply to the note as if it were a "natural", regardless of the key signature (see the F{{music|x}} in measure 2 of the Chopin example below).

If a note with a double sharp or double flat is followed by a note in the same position with a single sharp or single flat, there are two common notations. Modern notation simply uses a single flat or sharp sign on the second note, whereas older notation may cancel the double accidental with natural sign before applying the single accidental (example below). Changing a note with a double accidental to a natural may likewise be done with a single natural sign (modern) or with a [[double natural]] (older).
:<div style="background-color: white;"><score> {
\omit Score.TimeSignature \relative c'' {
 \time 3/2
  cisis2_"Older Practice" cis cisis\accidentalStyle modern cisis_"Modern Practice" cis cisis
} }
</score></div>

[[Image:Chopindoub.JPG|thumb|400px|center|An example of the use of a double accidental]]
{{Clear}}



Triple flats ({{music|bbb}}) and triple sharps ({{Music|#x}}) are extremely rare, altering a note by three semitones.<ref>{{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>

In [[Musical tuning|tunings]] where the number of notes per octave is not a multiple of 12 (e.g., tunings other than the standard [[12-TET]]), enharmonics are generally different. Accidentals would behave differently than in the standard tuning system and, for example, F{{music|x}} might not be enharmonically equivalent to G. This changes the effect of double and triple accidentals as well.