page_title: Polytonality
section_title: Polyvalency
hierarchical_section_title: Polytonality / Polytonality and polychords / Polyvalency
caption_attribution_description: English: Polyvalency in Stravinsky's Mass (Leeuw 2006, 88).
context_page_description: Polytonality is the musical use of more than one key simultaneously. Bitonality is the use of only two different keys at the same time. Polyvalence is the use of more than one harmonic function, from the same key, at the same time.
  Some examples of bitonality superimpose fully harmonized sections of music in different keys.
context_section_description: The following passage, taken from Beethoven's Piano Sonata in E♭, Op. 81a (Les Adieux), suggests clashes between tonic and dominant harmonies in the same key (Marquis 1964,).
  Leeuw points to Beethoven's use of the clash between tonic and dominant, such as in his Third Symphony, as polyvalency rather than bitonality, with polyvalency being, "the telescoping of diverse functions that should really occur in succession to one another" (Leeuw 2005, 87).
caption: Polyvalency in Stravinsky's Mass About this soundPlay (help·info) (Leeuw 2005, 88).
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