Ludus Tonalis


Ludus Tonalis, subtitled Kontrapunktische, tonale, und Klaviertechnische Übungen, is a piano work by Paul Hindemith that was composed in 1942 during his stay in the United States. It was first performed in 1943 in Chicago by Willard MacGregor. The piece explores, "matters of technique, theory, inspiration, and communication. It is in effect, a veritable catalogue of the composer's mature style."
The piece, which comprises all 12 major and/or minor keys, starts with a three-part Praeludium in C resembling Johann Sebastian Bach's toccatas, and ends with a Postludium which is an exact retrograde inversion of the Praeludium. In between, there are twelve three-part fugues separated by eleven interludes, beginning in the tonality of the previous fugue and ending in the tonality of the next fugue. The tonalities of the fugues follow the order of his Serie 1 and use the keynote C.
Ludus Tonalis was intended to be the twentieth-century equivalent to J.S. Bach's The Well-Tempered Clavier. Unlike Bach's work, though, the non-fugal pieces in Ludus Tonalis frequently repeat the work's main theme.
Ludus Tonalis can be thought of as the most direct application of Hindemith's theory that the twelve tones of the equally tempered scale all relate to a single one of them. The affinity of each note with the keynote is directly related to its position on the harmonic scale. In this system, the major-minor duality is meaningless and the practice of modulation is dropped, although subject modulation occurs in the second fugue, to create growing tension.

Structure

Ludus Tonalis consists of 25 movements:
  1. Praeludium. Partly in C and partly in F
  2. Fuga prima in C: Triple fugue
  3. Interludium: Romantic improvisation
  4. Fuga secunda in G: Dance in time
  5. Interludium: Pastorale
  6. Fuga tertia in F: Mirror fugue, where the second half is an exact retrograde of the first, except with voice paddings at their end exits.
  7. Interludium: Folk dance
  8. Fuga quarta in A: Double fugue
  9. Interludium: Baroque prelude
  10. Fuga quinta in E: Gigue
  11. Interludium: Romantic miniature
  12. Fuga sexta in E: Rococo style
  13. Interludium: March
  14. Fuga septima in A: Romantic style
  15. Interludium: Romantic miniature
  16. Fuga octava in D: Dance in time
  17. Interludium: Baroque toccata
  18. Fuga nona in B: Subject transformation fugue
  19. Interludium: Pastorale
  20. Fuga decima in D: Inversion fugue
  21. Interludium: Folk dance
  22. Fuga undecima in B : Accompanied canon
  23. Interludium: Romantic waltz
  24. Fuga duodecima in F: Stretto fugue
  25. Postludium: Retrograde inversion of the Praeludium.
There is a striking symmetry around the center of the cycle.