Double accidentals · Accidentals · Music theory
The double sharp (𝄪) raises a note two half steps and the double flat (𝄫) lowers it two. They appear when a note that is already altered has to go up or…
Double accidentals
The double sharp (𝄪) raises a note two half steps and the double flat (𝄫) lowers it two. They appear when a note that is already altered has to go up or down without changing its name: in G♯ minor, for example, the leading tone is F𝄪.
Where they appear and how they are removed
Double accidentals appear above all in keys with many accidentals, when an already altered note must rise or fall again: the leading tone of G♯ minor is F𝄪 and that of D♯ minor, C𝄪.
To go from a double to a single accidental, today you simply write the single one (♯ after 𝄪). It used to be written ♮♯, still seen in old editions. Triple accidentals are not used in normal practice.