|Component intervals from root|
|Forte number or Tuning|
In music, the "Ode-to-Napoleon" hexachord (also magic hexachord and hexatonic collection or hexatonic set class) is the hexachord named after its use in the twelve-tone piece Ode to Napoleon Buonaparte (1942) by Arnold Schoenberg (setting a text by Byron). Containing the pitch-classes 014589 (C, C♯, E, F, G♯, A) it is given Forte number 6-20 in Allen Forte's taxonomic system. The primary form of the tone row used in the Ode allows the triads of G minor, E♭ minor, and B minor to easily appear.
The "Ode-to-Napoleon" hexachord is the six-member set-class with the highest number of interval classes 3 and 4 yet lacks 2s and 6s. 6-20 maps onto itself under transposition three times (@0,4,8) and under inversion three times (@1,4,9) (six degrees of symmetry), allowing only four distinct forms, one form overlapping with another by way of an augmented triad or not at all, and two augmented triads exhaust the set as do six minor and major triads with roots along the augmented triad. Its only five-note subset is 5-21 (0,1,4,5,8), the complement of which is 7-21 (0,1,2,4,5,8,9), the only superset of 6-20. The only more redundant hexchord is 6-35. It is also Ernő Lendvaï's "1:3 Model" scale and one of Milton Babbitt's six all-combinatorial hexachord "source sets".
The hexachord has been used by composers including Bruno Maderna and Luigi Nono, such as in Nono's Variazioni canoniche sulla serie dell'op. 41 di Arnold Schönberg (1950), Webern's Concerto Op. 24, Schoenberg's Suite Op. 29 (1926), Babbitt's Composition for Twelve Instruments (1948) and Composition for Four Instruments (1948) third and fourth movements.[dubious ] The hexachord has also been used by Alexander Scriabin and Béla Bartók but is not featured in the music of Igor Stravinsky.
It is used combinatorially in Schoenberg's Suite:
P3: E♭ G F♯ B♭ D B // C A A♭ E F D♭ I8: G♯ E F D♭ A C // B D E♭ G F♯ B♭
Note that its complement is also 6-20.
- Yale School of Music (1959). Journal of Music Theory, Volumes 3-4, p.300.
- Van den Toorn, Pieter C. (1996). Music, Politics, and the Academy, p.128-29. ISBN 0-520-20116-7.
- Friedmann, Michael L. (1990). Ear Training for Twentieth-Century Music, p.198. ISBN 0-300-04537-9.
- Straus, Joseph N. (2004). Introduction to Post-Tonal Theory, p.97. ISBN 0-13-189890-6.
- Music Theory Society of New York State (2000). Theory and practice: newsletter-journal of the Music Theory Society of New York State, Volume 25, p.89.
- Schuijer, Michiel (2008). Analyzing Atonal Music: Pitch-Class Set Theory and Its Contexts, p.109. ISBN 978-1-58046-270-9.
- Palmer, John. "Ode to Napoleon Buonaparte, for narrator, piano & strings, Op. 41", AllMusic.com.
- Neidhöfer, Christoph (2007). "Bruno Maderna's Serial Arrays", Society for Music Theory. Volume 13, Number 1, March 2007.
- Friedmann (1990), p. 104.
- Van den Toorn (1996), p.132.
Further reading 
- Baker, James M. (1986). The Music of Alexander Scriabin, p. 214. New Haven: Yale University Press. ISBN 0-300-03337-0. Cited in Van den Toorn (1996), p.128-29.
- Rahn, John (1980). Basic Atonal Theory, p. 91. New York: Longman. ISBN 0-582-28117-2.
- Wason, Robert W. (1988). "Tonality and Atonality in Frederic Rzewski's Variations on "The People United Will Never Be Defeated!", Perspectives of New Music 26, no. 1. Cited in Van den Toorn (1996), p.128-29.