Re: grace notes/acciaccaturas occur before time signature change if only in bass clef

[Paul Hodges]

One of the oldest of all LilyPond bugs, to do with items which take no musical time.  You need to put a dummy grace note before the c in the upper staff; \grace s8 will do it.

Paul

From: Jin Choi <jsc@alum.mit.edu>
To: <lilypond-user@gnu.org>
Sent: 15/08/2023 19:30
Subject: grace notes/acciaccaturas occur before time signature change if only in bass clef

In the following snippet, a change of time signature appears after an acciaccatura if the time change happened in one staff without a grace note but a grace note appears in some other staff. Is there a way to fix this without making sure the time change always appears in the staff with the grace?

\version "2.24.1"

upper = \relative c' {
 \key c \major
 c1
 \time 2/2
 c1
}

lower = \relative c {
 \clef bass
 c1
 \acciaccatura c8 c1
}

\score {
 \new PianoStaff {
   <<
   \new Staff = "upper" \upper
   \new Staff = "lower" \lower
   >>
 }
}