Full scale JI preimage

[frostburn]

The scales you get by stacking the provided preimages get rather complex (benedetti hight). There are often simpler spellings available given the null space.

This would require some additional scale parameters like (bright gen) up and down. (Likely per period as the user cannot be expected to predict how the octave splits.)

When tempering out 81/80 with up=5, down=1 it would be nice to obtain e.g. Zarlino[7] as the output somehow:

9/8
5/4
4/3
3/2
5/3
15/8
2/1

Higher ranks structures are even harder to anticipate so I guess the app could suggest some good traversals or something.