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View Code? Open in Web Editor NEWA microtonal geography of the cello fingerboard
Home Page: https://mbarbin.github.io/fingerboard/
License: GNU Affero General Public License v3.0
A microtonal geography of the cello fingerboard
Home Page: https://mbarbin.github.io/fingerboard/
License: GNU Affero General Public License v3.0
As shown by systems/cello/e12/sixths.ml, there's a bug in the generation of double-stops that results in double stops played on strings IV-II:
┌─────┬────────┬───────┬───────┬──────┬────────┬───────┬───────┬──────────────┬───────┐
│ Low │ String │ Pos │ Cents │ High │ String │ Pos │ Cents │ Interval │ Cents │
├─────┼────────┼───────┼───────┼──────┼────────┼───────┼───────┼──────────────┼───────┤
│ F2 │ IV │ 4e │ 500 │ D3 │ II │ 0 │ 0 │ M6 - 9-12edo │ 900 │
└─────┴────────┴───────┴───────┴──────┴────────┴───────┴───────┴──────────────┴───────┘
In this specific example, the higher D is meant to be played on string III. This bug is visible in a few other lines in files sixths.ml, also in other systems.
As seen in systems/cello/e53/thirds.ml, the interval of the minor third shown below is 13-53edo. I intend for it to be adjusted to 14-53edo like the rest of the minor thirds in this table. This would be by making use of one of the Zarlinean combination with the changing degree on the F (degree IV) : specifically by adjusting the F3 to m3z-e53.
┌─────┬────────┬───────────┬───────┬──────┬────────┬───────────┬───────┬───────────────┬───────┐
│ Low │ String │ Pos │ Cents │ High │ String │ Pos │ Cents │ Interval │ Cents │
├─────┼────────┼───────────┼───────┼──────┼────────┼───────────┼───────┼───────────────┼───────┤
│ D3 │ III │ 5p-e53 │ 702 │ F3 │ II │ m3p-e53 │ 294 │ m3 - 13-53edo │ 294 │
└─────┴────────┴───────────┴───────┴──────┴────────┴───────────┴───────┴───────────────┴───────┘
I haven't determined yet whether to do this systematically as part of the scale constructor, or whether this should be overridden manually. I need to spend some time thinking about whether there exists a principal criteria that would lead to that particular choice for the changing degree. I intuitively suspect that such criteria exists.
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