Re: Bfa-Bmi key signature?

[Graham King]

I think this got lost in the ether earlier in the week when the lists were down, but someone might find the attached solution helpful.  It is good enough for my purposes.  Grateful acknowledgments to Pierre Perol-Schneider, Frank Z., and Urs Liska, all of whom unknowingly helped with the solution.

-- Graham

On Wed, 2015-09-30 at 13:58 +0100, Graham King wrote:
>     In transcribing a piece of renaissance music, I am trying to refine the following key signature:
>     
>     \version 2.19.21
>     \relative c' {
>       \set Staff.keyAlterations = #`(((-1 . 6) . ,NATURAL)
>                                      (( 0 . 6) . ,FLAT))
>       R1 b2 bes b' bes
>     }
>     
>     Ideally, the flat in the key signature should have a ledger line, and should be vertically aligned with the natural sign.  (There is a corresponding keysig in bass clef which also needs this alignment)
Oops, of course I meant that the _natural_ sign should have a ledger line (in treble clef).
>     
>     I have looked at:
>     1) The re-writing of the key signature engraver in Scheme: https://lists.gnu.org/archive/html/lilypond-user/2015-08/msg00429.html
>     
>     
>     2) The addition of ledger lines to a key signature: https://lists.gnu.org/archive/html/lilypond-user/2014-11/msg00454.html
>     
>     
>     3) The Notation Reference http://lilypond.org/doc/v2.19/Documentation/notation/displaying-pitches#key-signature and the sections of the Internals Reference that this refers to;
>     
>     and I confess that I'm floundering a bit.  Well, more than a bit.  
>     
>     This specific issue is quite common in early music, where the composer uses the hard hexachord.
>     
>     Grateful for any help/guidance !
>     
>     -- Graham 
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BfaBmi_keysigs.ily
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BfaBmi_keysigs.pdf
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