Xaetjeon

Naquian music

Tuning

Naquian music uses 7-tone scales rich in neutral thirds. Scales are abstractly viewed as subsets of 27 roughly equal divisions of the octave. The 3L 4s MOS scale (5 3 3 5 3 5 3) may be used, but they use other, non-MOS 7-note scales too. The quasi-equal 6L 1s MOS scale (4 4 4 4 4 4 3) in 27edo is mainly used as a reference point rather than actual music, in that notation is based on the 6L 1s scale in the same way that Western notation is based on the diatonic scale.

Movement by one step of 27edo is usually avoided, since it is difficult to sing.

Historically other micro-divisions have been used or proposed - especially 27-well temperaments, 17-well temperaments or 17-equal.

Sjowaazheñ music

Tuning

Sjowaazheñ music uses JI like Talman and Bjeheondian music, but the scales are traditionally based around tetrachords or pentachords, dividing the perfect fourth (4/3) into four or five parts. More sophisticated innovations have led to finer divisions of the perfect fourth. The octave may be divided into two perfect fourths plus one whole tone. However, in monophonic music, the n-chords may even be stacked on top of each other, without regard to octave equivalence.