J.S. Bach - 15 Two-part Inventions, BWV 772/786 - No. 7 in E Minor, BWV 778 (2声のインヴェンション BWV772-786: 第7番 ホ短調|15 Two-part Inventions, BWV 772/786: 　　　　　ホ|바흐: 15곡의 인벤션: 7번 마단조, BWV 778)