Prelude & Fugue No.13 in F-sharp major,BWV 858 Prelude & Fugue No.3 in C-sharp Major,BWV 848 Prelude & Fugue No.14 in F-sharp minor,BWV 859 Prelude & Fugue No.18 in G-sharp minor,BWV 863 Prelude & Fugue No.17 in A-flat major,BWV 862 Prelude & Fugue No.4 in C-sharp Minor,BWV 849 Prelude & Fugue no.4 in C sharp minor, BWV849 Prelude & Fugue No.11 in F major,BWV 856 Prelude & Fugue No.23 in B major,BWV 868 Prelude & Fugue No.15 in G major,BWV 860