accidentals

Signs used to change the pitch of a note.

key signature

Collective term for the accidentals placed after the clef to indicate the tonality of a composition.

sharp

Accidental placed before a note that raises it by a semitone.

natural

Accidental that cancels the effect of another accidental.

double flat

Accidental placed before a note that lowers it by two semitones.

double sharp

Accidental placed before a note that raises it by two semitones.

flat

Accidental placed before a note that lowers it by a semitone.