here my workround for this:
graceSchleifer =
#(define-music-function (parser location note) (ly:music?)
(make-music 'SequentialMusic
'elements (list #{
\once \override Voice.NoteHead #'stencil =
#ly:text-interface::print
\once \override Voice.NoteHead #'X-extent = #'(-2 . -0)
\once \override Voice.NoteHead #'text =
#(markup #:large #:halign .2 #:raise 0.0 #:combine #:halign
.8 #:musicglyph "scripts.prall"
#:rotate 140 #:normalsize #:raise 2.4 #:musicglyph "flags.u3")
\once \override Stem #'stencil = ##f
\once \override Flag #'stencil = ##f #}
note)))
usage: \grace{\graceSchleifer c16} e --> c16 indicates the pitch of the
prall.
Am So., 19. Sept. 2021 um 21:06 Uhr schrieb Hans Åberg <[email protected]>:
>
> > On 19 Sep 2021, at 14:44, 田村淳 <[email protected]> wrote:
> >
> > Hello Lukas,
> >
> >> 2021/09/19 21:14、Lukas-Fabian Moser <[email protected]>のメール:
> >>
> >> Hi Jun,
> >>
> >> Am 19.09.21 um 09:07 schrieb 田村淳:
> >>> Is there a snipett to realize this?
> >>> This is from the 3rd movement of the Sonata for Viola da Gamba and
> Harpsichord in G-minor, BWV 1029, by J. S. Bach.
> >>>
> >>> Thanks in advance for your kind help.
> >>>
> >>> Jun
> >>>
> >>> <ornamentation.jpg>
> >> I think that's an instance of
> >>
> >> https://gitlab.com/lilypond/lilypond/-/issues/6127
> >>
> >> https://lsr.di.unimi.it/LSR/Item?u=1&id=720
> >>
> >> https://gitlab.com/lilypond/lilypond/-/issues/503
> >>
> >> Lukas
> >>
> > Thank you. My question/request is identical to the issue #6127.
> >
> > According to the Wikipedia article
> https://en.wikipedia.org/wiki/Slide_(musical_ornament), the Schleifer can
> be used for arbitrary interval while J. S. Bach seems to have used it for
> third very often. I think that a solution with a fixed symbol for third
> would be beneficial at least for those who have been typesetting Bach’s
> music often.
>
> The Harvard Concise discusses it in the article on double appoggiatura,
> essentially a variation of two merged appoggiaturas a third apart. The
> symbol itself is called a direct, custos in Latin, in early manuscripts
> used at the end of staff to warn about the next note.
>
>
>
