Pandiatonic
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In music pandiatonic chordss and successions are those formed freely from all degrees of a diatonic scale without regard for their diatonic function, sometimes to the extent of no single pitch being felt as a tonic. The term was invented by Nicolas Slonimsky to describe examples such as the added sixth or the nonfunctional tonality of composers such as Aaron Copland (in his populist works; Jaffe, 1992), Igor Stravinsky (in his neoclassical works), and more recently Steve Reich and John Adams (Jaffe, 1992).
The Beatles used pandiatonicism in many of their songs, including This Boy (Mann, 1963).
Source
- Jaffe, Stephen. Conversation between SJ and JS on the New Tonality, Contemporary Music Review 1992, Vol. 6 (2), pp. 27-38
- Mann, William. London Times (December 27, 1963) via Companion