Re: (modified) Ben Johnston tuning system script

[allfifthstuning]

Thanks, 

I'll take a closer look at the EH notation and see if I can alter it.

Hans

Sent from my Samsung Galaxy smartphone.

-------- Original message --------

From: Graham Breed <address@hidden>

Date: 29/12/2017 19:13 (GMT+01:00)

To: allfifthstuning <address@hidden>, Urs Liska <address@hidden>

Cc: lilypond-user <address@hidden>, address@hidden

Subject: Re: (modified) Ben Johnston tuning system script

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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