[Lilypond-auto] Issue 3640 in lilypond: Accidentals don't reset after explicit barlines

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Enhancement

New issue 3640 by address@hidden: Accidentals don't reset after explicit  
barlines
http://code.google.com/p/lilypond/issues/detail?id=3640

This was originally part of issue 2379.  I am cutting and pasting two  
reports.  The first is about accidentals not resetting at an explicit bar  
created at \cadenzaOff, the second is about accidentals not resetting at an  
explicit bar created inside of unmetered music entered via \cadenzaOn/Off.   
However, both reports actually can be considered only loosely related to  
cadenze as explicitly generated bars will generally be considered an  
accidental boundary (excepting, of course, \bar "" used for allowing  
breakpoints).

I am marking this issue as "Enhancement": the behavior is definitely a  
nuisance, but I don't think that we have any different expectations  
documented somewhere.

I append the original reports:

David Bobroff restated the problem in a post here:

http://lists.gnu.org/archive/html/bug-lilypond/2012-03/msg00238.html

Text of original post follows:

I'm re-framing my query regarding accidental behavior following  
\cadenzaOff. After some discussion about this on bug- it is quite clear  
that '\cadenzaOff' *only* affects counting/timing and '\bar' *only* paints  
a graphic of a bar line. Currently, if an accidental appears in the cadenza  
it will be visibly canceled if the key signature value of the note is used  
in the next "measure" even if '\cadenzaOff \bar "|."' is present. Musically  
this should not happen. Since a bar line has gone by the key signature is  
back in force.

This post in on -user to see if anyone has a solution; how do I suppress  
the accidental cancellation in the following example?

I've posted this to bug- to suggest that LilyPond should probably  
understand this.

Example:

%%%
\version "2.14.2"

\relative c'
{
  \key c \major
  \time 2/4
  c2 ~
  \cadenzaOn
  c4 \teeny d8-[ es f g-] \normalsize a4-\fermata
  \cadenzaOff
  \bar "|"
  e2 % how to suppress accidental cancellation here?
}
%%%

-David

Nathan Williams reported surprising behaviour:

http://lists.gnu.org/archive/html/bug-lilypond/2012-05/msg00060.html

Original post follows:

When using a cadenza across several measures (for engraving unmetered  
Russian
liturgical music), accidentals are displayed only the first time they occur.

I.e.:

\cadenzaOn

d4 e f2( d8[ e] f4) f f4 f( e2 f4) d1
\bar "|"
e4 e e f( e) d cs d1
\bar "|"
f2 ( d8[ e] f4) f f4 f( e2) f4 d1
\bar "|"
e4 e e f( e d) cs d1
\bar "|"
f2 ( d8[ e] f4) f f( e2 f4 d2 f4 e d cs d) e d1
\bar "|"
e4 e e e f( e) d cs8([ d] e4 d cs) d1
\bar "||"

\cadenzaOff

C sharp, which occurs in lines 2, 4, 5, and 6, is only displayed the first  
time
it occurs, in line 2.

Since using \cadenzaOn and \cadenzaOff is a recommended solution for  
engraving
unmetered music (see
http://lilypond.org/doc/v2.12/Documentation/user/lilypond/Working-with-ancient-music_002d_002dscenarios-and-solutions),
it would be great if the issue were corrected, or else a workaround  
provided and
the issue inserted on the above page in the "known issues and warnings"  
section.

Thank you!


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