Felix Krause wrote:
Hi all,
I have two problems with endings of volta repeats:
1) I have a volta repeat with an alternative ending, like this:
\override Score.BarNumber #'break-visibility = #'#(#t #t #t)
\repeat volta 2 { r4 f r f }
\alternative { { r f r f } { r f r a, } }
d a d a
The two endings should have the same bar (=measure) number. But
lilypond increments the bar number of the second ending by 1. This is
pretty annoying, as I need to manually set the bar number, like this:
\override Score.BarNumber #'break-visibility = #'#(#t #t #t)
\repeat volta 2 { r4 f r f }
\alternative { { r f r f } {
\set Score.currentBarNumber = #2
r f r a, } }
d a d a
Is there a setting or something to do this automatically? Why isn't it
done by default anyway? (btw: the override command is just used to
demonstrate the problem, I only need the measure numbers at the
beginning of each line.)
One alternative is to (mis)use the \partial command in the following way:
\relative c' {
\override Score.BarNumber #'break-visibility = #'#(#t #t #t)
\repeat volta 2 { r4 f r f }
\alternative { { r f r f } {
\partial 1
r f r a, } }
d a d a
}
As you can see from the typeset output, the difference is that it will
not write out the bar numbers in the second repeat, but the subsequent
bar numbers will be counted as if the first and second endings had the
same bar number. At second thought, this method is not preferable if
your second ending includes several measures. Even though, you can get
the subsequent bar numbers the way you want them by inserting \partial
1*3 (or whatever number of measures), the full second ending will be
counted as a single measure when it comes to the typesetting of
automatic accidentals.
A perhaps better solution is to use some Scheme code, to add an offset
to the current bar number:
\version "2.12.0"
% Inspired by http://lsr.dsi.unimi.it/LSR/Item?id=333
adjustBarNumber = #(define-music-function (parser location offset) (number?)
(make-music 'ApplyContext
'origin location
'procedure (lambda (x)
(begin
(ly:context-set-property!
(ly:context-property-where-defined x 'internalBarNumber)
'internalBarNumber
(+ offset (ly:context-property x 'internalBarNumber)))
(ly:context-set-property!
(ly:context-property-where-defined x 'currentBarNumber)
'currentBarNumber
(+ offset (ly:context-property x 'currentBarNumber)))))))
\relative c' {
\override Score.BarNumber #'break-visibility = #'#(#t #t #t)
\repeat volta 2 { r4 f r f }
\alternative { { r2 f r f } {
\adjustBarNumber #-2
r f r a, } }
d a d a
}
You don't have to understand how it works to use it, just copy the
definition of adjustBarNumber and use it with \adjustBarNumber #-4 if
you want to decrease the bar number by 4 or \adjustBarNumber #5 if you
want to increase it by 5, for example.
/Mats
2) I want to place a mark over the bar right after the second ending:
\repeat volta 2 { r4 f r f }
\alternative { { r f r f } { r f r a, } }
\bar "||" \mark "A"
d a d a
The "A" is printed above the bar of the second ending - it would be
prettier to have it right above the bar. I found this in the language
reference to shorten the bars:
\repeat volta 2 { r4 f r f }
\alternative { { r f r f } {
\set Score.voltaSpannerDuration = #(ly:make-moment 3 4)
r f r a, } }
\bar "||" \mark "A"
d a d a
Unfortunately, this closes the second bar with a vertical line for
some reason. How do I make it stay open? (or how do I print the "A" to
the same height as the bar without shortening it?)
Cheers,
Felix
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--
=============================================
Mats Bengtsson
Signal Processing
School of Electrical Engineering
Royal Institute of Technology (KTH)
SE-100 44 STOCKHOLM
Sweden
Phone: (+46) 8 790 8463
Fax: (+46) 8 790 7260
Email: mats.bengts...@ee.kth.se
WWW: http://www.s3.kth.se/~mabe
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