A (musical note) A (la) is a fundamental musical pitch used for tuning, notation, and key centers. It spans many octaves (A0–A7 on piano) and is commonly fixed at A4 = 440 Hz as a concert standard.
Bar (music): structure, types, and role in musical notation Bar (music) A bar (or measure) divides written music into equal time segments defined by the time signature. This article explains bars, barlines, meters, repeats, conducting cues, history, an…
