On 28/12/17 13:16, allfifthstuning wrote:
I've described my method of determining a note name (see attachment).
Currently I'm reading the scheme git book
(https://scheme-book.ursliska.de/) which is very helpful.
Do I understand correctly that to determine the right note name with EH
and Sagittal notation that a ratio is checked against a list of ratios
and corresponding glyphs?
The two work differently. Both factorize the ratio (relative to the
base notes). Sagittal converts that into an equal temperament, and then
assigns a string (not always a single glyph) to each step of the equal
temperament. (This is not quite how Sagittal should work.)
For Helmholtz notation, the factorized ratio maps to a set of glyphs
used for notating small intervals, one for each prime number. Then it
combines those glyphs to get a string for the full accidental. The same
process should work for Johnston notation.
Graham
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