(modified) Ben Johnston tuning system script

[All Fifths Tuning]

Dear fellow Lilypond-users,


I would like to write music in just intonation.

I would like to make a script similar to the (great!) Sagittal script of 
Graham Breed (http://x31eq.com/lilypond/) but for the so called Ben 
Johnston tuning system (BJTS) (I've noticed there was some discussion 
about it a while ago).

The BJTS identifies every just interval as a discrete note, so there is 
not one the same.

I use the so called Pythagorean scale as my basenotes (here I differ 
from the original tuning system) C - D - E - F - G - A - B. These 
basenotes are raised or lowered with all sorts of comma's and chroma's 
to represent the appropriate pitch.

This means that every ratio corresponds with a specific note name.

I've reworked a linux based tuner to accommodate the BJTS 
(https://github.com/brummer10/gxtuner), there I "calculate" every 
notename from the ratio.


I would like to gather some advice about how I could create a script for 
Lilypond.

Is it possible anyway?

What would be a good route to follow?

For example I could make a list of intervals with corresponding 
notenames or I can make notename "calculator".

Are there tutorials for scripting with Lilypond?


I'll be happy to spend some time on this subject, so I don't mind a 
(steep) learning curve.


Thanks in advance!


Kind regards,


Hans