A symbol that alters a note's pitch: sharp (#) raises by a half-step, flat (b) lowers by a half-step, natural (♮) cancels a previous sharp or flat.
Notes outside the key signature are called 'accidentals' because they were historically seen as accidental deviations from the mode.
Understanding accidental is essential for reading and writing music accurately. Whether you are a beginner learning to read notation or an experienced composer, knowing how this musical element works improves your musicianship.
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Browse the full Music Terms Glossary for definitions of 30+ essential musical terms.