15 pieces :
Invention in C major, BWV 772
Invention in C minor, BWV 773
Invention in D major, BWV 774
Invention in D minor, BWV 775
Invention in E♭ major, BWV 776
Invention in E major, BWV 777
Invention in E minor, BWV 778
Invention in F major, BWV 779
Invention in F minor, BWV 780
Invention in G major, BWV 781
Invention in G minor, BWV 782
Invention in A major, BWV 783
Invention in A minor, BWV 784
Invention in B♭ major...(+)
15 pieces :
Invention in C major, BWV 772
Invention in C minor, BWV 773
Invention in D major, BWV 774
Invention in D minor, BWV 775
Invention in E♭ major, BWV 776
Invention in E major, BWV 777
Invention in E minor, BWV 778
Invention in F major, BWV 779
Invention in F minor, BWV 780
Invention in G major, BWV 781
Invention in G minor, BWV 782
Invention in A major, BWV 783
Invention in A minor, BWV 784
Invention in B♭ major, BWV 785
Invention in B minor, BWV 786