[ I have reposted this from the LilyPond bug mailing list. Elmo, be sure
to post to lilypond-user@gnu.org in the future. ]
On Sat, Apr 19, 2025 at 5:33 PM Elmo Todurov via bug-lilypond <
bug-lilyp...@gnu.org> wrote:
> Hi folks, I found a case where an appoggiatura requires the preceding
> note to be long enough.
>
> Making the preceding note longer fixes the issue.
> Making the appoggiatura shorter (2 notes instead of 3) fixes the issue.
> Writing the music on the same staff using << {} \\ {} >> fixes the issue.
> Adding some grace notes to the bottom staff fixes the issue (but not
> grace rests/skips, these don't fix it).
>
> I found this 18 year old task that appears to be somewhat relevant:
> https://gitlab.com/lilypond/lilypond/-/issues/34
>
> Do you have suggestions how I could typeset my music so it'd sound good
> in MIDI?
>
> \version "2.25.24"
> \score {
> <<
> {
> \partial 16
> f'16 | % Shorter than 1/4 * appoggiatura?
> \appoggiatura { e'8 e'8 e'8} % Longer than 1/4 * preceding note?
> e'1 |
> % Desync. Looks fine but sounds horrible.
> e'8 e' e' e' e' e' e' e' |
> }
> {
> \partial 16
> c'16 |
> % fixes the desync, but I don't want these notes:
> % \grace { c8 c8 c8 }
> % does not fix the desync: \grace { s8 s8 s8 }
> c'1 |
> c'8 c' c' c' c' c' c' c' | % Desync
> }
> >>
> \layout {}
> \midi {}
> }
>
You can have the MIDI in sync and the output looking good by "scaling" the
durations. I used 8*1/2 but you can use any exponent of two as the
denominator that creates a valid duration.
%%%
\version "2.25.24"
\score {
<<
{
\partial 16
f'16 |
% shorten the duration by multiplying by a fraction
\appoggiatura { e'8*1/2 e' e' }
e'1 |
e'8 e' e' e' e' e' e' e' |
}
{
\partial 16
c'16 |
% \grace { s8*1/2 s s } % Surprisingly, doesn't seem necessary
c'1 |
c'8 c' c' c' c' c' c' c' |
}
>>
\layout {}
\midi {}
}
%%%
--
Knute Snortum
