How does a sharp affect the pitch of a note?

A sharp raises the pitch of a note by a semitone. When a note is sharpened, it is moved up to the next higher key on the keyboard or fretboard, which corresponds to one half step in western music notation. This adjustment alters the sound of the note, making it higher in pitch compared to its natural state.

Understanding this concept is crucial for interpreting music, as it helps musicians make appropriate adjustments to notes throughout a piece, especially in the context of scales, chords, and key signatures. The raising of a note's pitch by a semitone is fundamental to many musical ideas, such as modulation and harmonic movement. This distinction is essential for musicians to grasp to accurately perform and compose music across various styles and genres.