The Inventions and Sinfonias, BWV 772–801, also known as the Two- and Three-Part Inventions, are a collection of thirty short keyboard compositions by Johann Sebastian Bach (1685–1750): 15 inventions, which are two-part contrapuntal pieces, and 15 sinfonias, which are three-part contrapuntal pieces. They were originally written as musical exercises for his students.
This App Only contain BWV772 ～ 786， （15 songs）。
Inventions和Sinfonias，BWV 772-801，也被称为两部和三部创意曲，是约翰·塞巴斯蒂安·巴赫（1685-1750）的三十个短键盘作品的集合：15首Inventions，这有两个声部 ， 它最初是巴赫为他的学生练习而写成。
此App目前只包含BWV772～786 15首 Inventions。