Question: what do the symbols mean on sheet music?
Answer: A sharp, denoted by the ♯ symbol, means that note is a semitone (or half step) higher than the note head to its right on sheet music. Conversely, a flat, denoted by a ♭ symbol, means the note is a semitone lower than the note head to its right. ... A natural cancels a sharp or flat within a measure or a song.