高桥アキ（Aki Takahashi）演奏舒伯特：变奏曲D.576/格拉茨幻想曲D.605A/四首即兴曲D.899 P1 - [1] “于滕布伦纳”主题变奏曲，D.576 / 13 Variations on a Theme by Anselm Hüttenbrenner D.576