Ключевые слова: art, black, board, class, classic, classical, clef, closeup, compose, composer, composition, harmony, instrument, key, keyboard, learning, lesson, little, melody, music, musical, musician, notation, note, notes, paper, pattern, person, piano, play, position, rhythm, school, sheet, song, sound, study, symbol, tempo, training, treble, tune, white, write, young,