12 Two-part Inventions for Piano in Lydian, Dorian and Phrygian (1928; 1951), op. 2

1. in F Lydian
2. in F sharp Dorian
3. in G Phrygian
4. in A flat Lydian
5. in A Dorian
6. in A sharp Phrygian
7. in B Lydian
8. in C Dorian
9. in C sharp Phrygian
10. in D Lydian
11. in E flat Dorian
12. in E Phrygian