Re: Enharmonically override key signature

[Jean Abou Samra]

Hello,

Le 30/03/2021 à 03:33, Kieren MacMillan a écrit :
> Hi Craig,
>
> > That worked for my over-simplified MWE. But here's my real-world problem with 
> > multiple key changes. There are only some that need to be over-ridden 
> > enharmonically. See bar 2 of the Alto Sax where I'd like to override this key 
> > signature without changing the whole global setup. Is this possible?

I have to say that in 99.99% of cases, "Is this
possible?" is a rhetorical question in LilyPond.

> If it is, I can’t wait to see the solution… As the composer and arranger of 
> musical theatre and other multi-instrumentalist music, Lilypond’s awkward 
> handling of key signatures and transposition is a long-time thorn in my side.
>
> David K once devised a rather brilliant almost-solution (cf. 
> <http://lilypond.1069038.n5.nabble.com/quot-smart-quot-transposition-of-key-signatures-td151940.html>),
>  but it wasn’t able to handle the high abstraction of my Lilypond code. There was a 
> suggestion that an “enharmonize-engraver” might solve the problem, but I don’t think 
> anyone tackled that.


Something like the attached? While admittedly ugly and
in need for more testing, it should provide
a start. I would be curious of better approaches
others may think of.

There is a big drawback: \relative changes behavior
in the naturalized version. I haven't investigated
how to fix it yet.

Regards,
Jean

naturalize-engraver.ly
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