Ключевые слова: abstract, aged, antique, art, background, black, book, card, classical, close, color, composer, composition, computer, design, guitar, harmony, instrument, key, keys, learning, letter, line, macro, melody, music, musical, musician, note, old, open, orchestra, paper, pattern, piano, play, reading, retro, score, sheet, singing, song, sound, staff, symbol, time, treble, up, vintage, white,