INTERVALCLASS

Interval class

In musical set theory, an interval class, also known as unordered pitch-class interval, interval distance, undirected interval, or interval mod 6, is the shortest distance in pitch class space between two unordered pitch classes. For example, the interval class between pitch classes 4 and 9 is 5 because 9 − 4 = 5 is less than 4 − 9 = −5 ≡ 7 . See modular arithmetic for more on modulo 12. The largest interval class is 6 since any greater interval n may be reduced to 12 − n.

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interval class

Noun

  1. An interval measured by the distance between its two pitch classes ordered so they are as close as possible.


The above text is a snippet from Wiktionary: interval class
and as such is available under the Creative Commons Attribution/Share-Alike License.

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