Re: Mensural ligature

[Jean-Charles Malahieude]

Le 09/05/2014 01:04, KarlHammer disait :
> Jean-Charles Malahieude:
> > On my way to typeset a mass by Monteverdi, I'm blocked with some
> > ligatures (see
> > http://musicofyesterday.com/historical-music-theory/expanded-history-musical-notation-part-4/
> > for examples)
>
> You seem to equate ligatures with legato, I'd be interested to hear
> if you have any references to that.
>
> > I can code the first one in its 8th image like this:
> >
> >     << \tag #'Urtext { \[ d1 e1*3/4 \] }
> >        \tag #'Modern { d1 e2. } >> f4 g1
> >
> > but don't find any way to get the E in black.
>
> This is what I did one in a time (\version "2.6.5"):
>
>      g1 \[ d \melisma
>            % this is a fake minor calor, together with the moved b4
>            \once \override TextScript #'extra-offset = #'( 0.9 . -1.8)
>            a'1*3/4^\markup{ \beam #0.9 #0 #0.5 }
>            \]

I've been able to "factorize" this a little, but don' reach the point 
where I could set everything in one pass (automatic vertical positioning).

I define two variables:

blackout =
  ^\tweak #'outside-staff-priority ##f
  ^\markup { \beam #0.9 #0 #0.5 }

% set the position of blackout on the staff
% 0 is center line, step is 0.5
fix =
  #(define-music-function
     (parser location Y-offset)
     (number?)
     #{
        \once \override TextScript.Y-offset = #Y-offset
     #})

and use them as is:

    g1 \[ d \melisma
          \fix #0 a'1*3/4\blackout
       \] b4


Cheers,
Jean-Charles

ligatures.png
Description: PNG image

ligatures.ly
Description: Text Data