33 Piano Variations In C, Op. 120 On A Waltz By Anton Diabelli - Variation 30. Andante, sempre cantabile (以安东·迪亚贝利的圆舞曲为主题的C大调33首主题变奏曲，Op. 120 - 变奏曲30 行板，富于歌唱性) (C minor)