Dear LilyPonders,
I don’t know if this has been discussed before (I tried to search for some
threads, but it didn’t seem to cover this specific example…), but I have run
into a curious case of Hairpin not being recognized as attached to a note when
it is used in tandem with \tweak and \after, getting some warnings “Unattached
CrescendoEvent” as well as “unterminated crescendo."
Here is a short code, in which the aim of the four examples is to change the
color of the Hairpin to red. I have used \tweak and \after in different
configurations:
%%% BEGIN %%%
\version "2.24.4"
{
c'1 \tweak Hairpin.color #red \< c'1\f
}
{
c'1
\tweak Hairpin.color #red
\<
\after 2. \! c'1
}
{
\after 2. \!
c'1
\tweak Hairpin.color #red %% comment/uncomment this line
\<
}
{
\once \override Hairpin.color = #red
\after 2. \!
c'1 \<
}
%%% END %%%
...I have found it curious that when a note is sandwiched by \after and \tweak
as in the third example, the Hairpin is not recognized as being attached to
c’1. Rewriting it as the fourth example worked.
I ran into this situation as I was using my own flared hairpin that I brought
to the attention of this thread several weeks ago
(https://lists.gnu.org/archive/html/lilypond-user/2025-12/msg00215.html), which
I was trying to use on a note that also had \after attached to it.
Consequently, I had to come up with an alternative flared-hairpin code that
uses the principle of the fourth example. (Werner, I have not yet followed
through on creating an issue on GitLab on that (sorry!), but also I am glad I
didn’t put up the code that doesn’t work in a case like this, frequency of
which is probably higher than “rare.”)
I admit that while I have reread all the relevant documentation re: \tweak,
\override, \once, \offset, etc., I might have missed some crucial point, or
maybe I am relying on \tweak too much (!), but if there is a page/discussion
thread I may have missed that covers this point, I’d be grateful if you can
share. Otherwise, I thought to bring this to the community’s attention in the
event someone else might benefit from it.
All the best,
Yoshi
-- -- --
Yoshiaki Onishi
https://github.com/yoshiakionishi/lilypond-snippets
