Description:
This object creates a Moment of Symmetry without a octave equivalence. For make the octave equivalence use the object Octave-reduce, choose the range of the this MOS.
MOS is a Theory of the composer Erv Wilson.
Wilson coined the term (MOS) to describe those scales resulting from a chain of intervals that produce two (and not three) different-sized intervals.
These intervals are designated as the small (s) and large (L) intervals (FOR MAKE THIS USE THE OBJECT MOS-verification).
The relative number of s and L intervals in an MOS is co-prime, i.e., they share no common factors other than 1. Fractions are used to represent MOS scales: the numerator shows the size of the generator, and the denominator shows the number of notes in the scale.
The numerator and denominator of fractions representing MOS are also co-prime. Wilson organizes these fractions hierarchically on the Scale Tree. MOS are not only scales in their own right but also provide a framework or template for constructing a family of Secondary MOS scales. (in NARUSHIMA - Microtonality and the Tuning Systems of Erv Wilson-Routledge).
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