Re: Bagpipe Music and Grace Notes

[Mats Bengtsson]

Roland's solution is fairly clumsy, since it hard codes the
position of the beam. It's better to change the default stem
lengths for beamed grace notes.

Andrew, you didn't say what LilyPond version you use. I assume
the latest stable version 2.2, which means that the syntax is not
exactly the same if you use an older version.

The properties that determine the stem lengths for beamed notes
are documented at
http://lilypond.org/doc/v2.2/Documentation/user/out-www/lilypond-internals/Stem.html
since they live in the "Stem" object. There, you can also find the
default values for normal notes. Especially, you should look for the
beamed-lengths (and beamed-minimum-free-lengths and
beamed-extreme-minimum-free-lengths) properties.
However, for grace music, the default settings are determined by the
variable graceSettings at
http://lilypond.org/doc/v2.2/Documentation/user/out-www/lilypond-internals/Score.html

To change the setting for a single set of grace notes, try something
like:
  \grace{
  \override Stem #'beamed-lengths = #'(2.6 2.6 3.2)
   f64 [ e d c ] }

(the third number determines the length of 32nd notes, since they have
three flags).

To do the same setting for all future beams in the score, you can read
about the add-grace-property function at
http://lilypond.org/doc/v2.2/Documentation/user/out-www/lilypond/Grace-notes.html
(there's an error in the syntax, though) and try something like:

#(add-grace-property 'Voice 'Stem 'beamed-lengths '(2.6 2.6 3.2))

The default values for grace notes should be corrected. Probably,
very few users have tried 32nd notes before, I can't recall having
seen the problem mentioned before.

   /Mats


Roland Goretzki wrote:
> Hello list, hello Andrew,
>
> You wrote:
>
>
> > Bagpipe music has tons of grace notes, all of which are printed as 32nd
> > notes.  The main problem I'm having is with beamed grace notes.  The
> > stems on groups of grace notes are just a little too short, and
> > sometimes the third beam actually collides with note heads.  You can see
> > this in input/test/bagpipe.ly.
> >
> > I'd really appreciate help about how to correct this behavior.  Thanks
> > in advance.
>
>
> Unfortunately I don't know a global solution, but a local solution would
> be par example for the following little code
>
>   \score { \notes \relative c'' {
>     \grace { f64 [ e d c ] } e16 [ d f e ] d [ g f e ] }
>   }
>
> to put a line before the beamed group like this:
>
>   \score { \notes \relative c'' {
>     \once\override Beam #'positions = #'(5.5 . 4.5)
>     \grace { f64 [ e d c ] } e16 [ d f e ] d [ g f e ] }
>   }
>
> For this example it is a better solution, but the vertical positions
> determined with "5.5" (beginning) and "4.5" (end) is not relative to the
> noteheads, but to the staff, so with changing pitches You have in each
> case to change the vertical positions again.
>
> Nevertheless:
> Perhaps this is the solution which You was looking for ... :)
>
> Best Regards           Roland
>
>
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> Lilypond-user mailing list
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--
=============================================
        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
        Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe
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