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• s  using more than one key or tonality simultaneously
  exciting rhythms and polytonal harmonies

• Over the years, Stravinsky experimented with virtually every technique of 20th century music: tonal, polytonal and 12-tone serialism.
• Often based on old hymn tunes, his music abounds in polytonal harmonies, complex rhythms; much of it is log-cabin crude and just as American.
• When listeners notice his Bach-like counterpoint and his big, polytonal chords, he says, "When I play jazz I am influenced by classical music.