Ключевые слова: art, audio, background, blackboard, board, chalk, chalkboard, chords, class, classic, classical, classroom, clef, composition, concert, design, different, drawn, education, green, key, learn, line, lines, many, melody, modern, music, musical, notation, note, notes, object, rhythms, school, sign, song, sound, staff, stave, study, style, symbol, symbols, symphony, tone, treble, tune, white, written,