Re: Gregorian notation - augmentum problem

[Phil Holmes]

----- Original Message ----- 
From: "Noeck" <address@hidden>
To: "lilypond-user" <address@hidden>
Sent: Wednesday, October 28, 2015 10:32 PM
Subject: Gregorian notation - augmentum problem


> Hi,
>
> I know that the support for Gregorian chant is not the best. But does
> anybody know how to solve this:
>
> If I add an \augmentum, the line breaks at this point and the former
> part is stretched to fill the line. Can I avoid this?
> Here is a small example:
>
> \include "gregorian.ly"
> #(set-global-staff-size 40)
>
> music = {
>  \repeat unfold 20 a
>  % \augmentum
>  b
>  \repeat unfold 20 a
> }
> \new VaticanaStaff \music
> \new Staff \music
>
> In my real piece (150 lines), the situation is even worse and the line
> breaks after the first 1,5 words while usually about 10 words fit into
> one line. Adding more \augmentum commands in other places sometimes
> solve the issue for others. Unpredictable for me. The worst case was
> that the second line did not break anymore and went off the page. I
> guess some note value scaling and the requirement that line breaks can
> only happen at bar lines?
>
> Next question: Why this grouping by four? Are there invisible bar lines?
> \cadenzaOn solves that but now I lack automatic line breaking. Any ideas
> to that? Can the spacing be done without any timing just by the need of
> the lyrics?
>
> Cheers,
> Joram


I think there are two issues here: one is LilyPond's handling of bar lines 
in what is intended to be unmetered music, and the other is your use of the 
augmentum.  Taking the second first, the way you're using it is putting an 
extra half beat in the music, so we effectively try to fit 4.5 beats into a 
4 beat bar.  This messes up the timing of every following bar, so it's 
really not a good thing.

I've taken some settings I use for Mensural music, and using them all fixes 
your problem with the rest of the layout.  You may like to experiment to see 
if they're all necessary.  Note the extra \bar "" in the music.

\include "gregorian.ly"
#(set-global-staff-size 40)

music = {
a \bar"" \repeat unfold 40 a
\augmentum b
\augmentum b
\repeat unfold 40 a
}
\score {
\new VaticanaStaff \music
\layout {
ragged-last = ##f
indent = 0.0
timing = ##t
barAlways = ##f
\context {
\Score
\override SpacingSpanner #'spacing-increment = #0
\override SpacingSpanner #'base-shortest-duration = #(ly:make-moment 1 2)
\remove "Default_bar_line_engraver"
}
}
}
\new Staff \music




--
Phil Holmes