WebFacts 1
Some music theorists prefer to order numbers from 0 to 11, rather than 1 to 12. This
allows them to construct an order-number matrix with some of the same properties of an
invariance matrix. Such a matrix can predict pc adjacencies that will be held invariant in various
forms of the row. For more information, see Robert Morris, Composition with Pitch Classes
(New Haven: Yale University Press, 1987).
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