Ключевые слова: acoustic, art, artistic, background, black, chords, classic, classical, clef, closeup, composer, composition, concert, design, education, element, harmony, instrument, key, learn, line, melody, modern, music, musical, musician, nobody, note, notes, object, page, paper, pen, piano, play, school, sheet, sign, song, sound, stave, study, style, symbol, symphony, table, treble, white, write, written,