extended-common-practice · hook2011-review-geometry-of-music

As early as page 4 of AGOM, he identifies five features characteristic of “tonality” taken broadly. (These should be relatively uncontroversial; harmonic consistency and smooth voice leading are two of them.) He revisits these features throughout the book, describing how their interactions are constrained by geometry, and postulating that in various manifestations and combinations they characterize an “extended common practice” that stretches from eleventh-century polyphony through contemporary jazz ... Significantly, of the five features of tonality, the one that most sharply discriminates the traditional “common practice” of the eighteenth and nineteenth centuries from the remainder of Tymoczko's “extended common practice” is centricity