I'm not top posting.
%{
I need hooks.
They appear, for example in Bach BWV 691 measures 3 and 4.
I've been making them from an appoggiatura with the grace note blanked out,
but it typically takes some tweaking to make the hook look right.
See also:
Willard A. Palmer ed.
J.S. Bach inventions & Sinfonias: 1991
(Van Nuys, CA: Alfred Publishing Co)
pp. 4, 9
%}
\version "2.10.25"
\layout { ragged-right = ##t }
\relative c'
{
fis16 \noBeam
\once \override Score.SeparationItem #'padding = #2
\once \override Slur #'extra-offset = #'( -0.75 . 1.5 )
\hideNotes
\appoggiatura a16 % 'a' was chosen to get the right shape for the hook,
% not to indicate the pitch of the appoggiatura.
\unHideNotes
e8
d'16 \noBeam
\once \override Score.SeparationItem #'padding = #1.5
% Lilypond makes a big slur to curve under the sharp sign, but it doesn't look
right as a hook.
% So we set the control points explicitly.
\once\override Slur #'control-points = #'((0 . .5) (.2 . -.3) (.7 . -0.7)
(1.5 . -.8))
\hideNotes
\appoggiatura a16
\unHideNotes
gis8.
}
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