Complexe sonore

File:Complexe sonore.pngs or seventh chords {{audio|Complexe sonore.mid|Play}}.]]

File:Complexe sonore scales.png on E, G, B{{music|b}}, and D{{music|b}}, (top three) from that scale.Taruskin (2000), p.439.]]

The complexe sonore is an octatonic chord consisting of minor third relations.Taruskin, Richard (1996). Stravinsky and the Russian Traditions: A Biography of the Works through Mavra, p.937 and 1394. {{ISBN|0-520-07099-2}}.

More precisely, the complexe sonore is Igor Stravinsky's use of diatonic and whole tone motifs, and scales, against an octatonic background, rotated by minor thirds. Stravinsky "considered them to be in a perpetual state of potential symmetrical rotation by minor thirds under which the octatonic background scale is invariant."Taruskin, Richard (2000). Defining Russia Musically: Historical and Hermeneutical Essays, p.438. {{ISBN|978-0-691-07065-0}}. Dmitri Tymoczko argues that Stravinsky's octatonicism results "from two other compositional techniques: modal use of non-diatonic minor scales, and superimposition of elements belonging to different scales."{{Cite journal |last=Tymoczko |first=Dmitri |date=Spring 2002 |title=Stravinsky and the Octatonic: A Reconsideration |url=https://dmitri.mycpanel.princeton.edu/files/publications/stravinsky.pdf |journal=Music Theory Spectrum |volume=24 |issue=1 |pages=68–102 |doi=10.1525/mts.2002.24.1.68}}