Accidental (music)
NOTE WHOSE PITCH IS NOT A MEMBER OF THE SCALE OR MODE INDICATED BY THE MOST RECENTLY APPLIED KEY SIGNATURE
Accidentals; Sharps and flats; 𝇒; Triple accidental; Double accidental; Courtesy accidental; Musical accidental; Cautionary accidental; Cautionary accidentals; Courtesy accidentals; Reminder accidental; Reminder accidentals
In music, an accidental is a note of a pitch (or pitch class) that is not a member of the scale or mode indicated by the most recently applied key signature. In musical notation, the sharp (), flat (), and natural () symbols, among others, mark such notes—and those symbols are also called accidentals.