Ключевые слова: art, bar, black, chord, classic, classical, clef, compose, composer, composing, composition, concert, detail, entertainment, exercises, harmony, instrument, key, lesson, melody, music, musical, musician, note, orchestra, page, paper, piece, play, printed, read, rhythm, scales, score, sheet, sheet music, sheetmusic, song, sound, symbol, treble, tune,