Re: Bar numbers at beginning of line

[Mats Bengtsson]

As a musician, I would get very confused if I saw a bar number
in the middle of a measure (which is what you seem to try to achieve). 
If the conductor asked an orchestra to play from bar 100 and the bar 
number was printed that way, I'm sure that
at least half the orchestra would start at the top of the line
(i.e. in the middle of the measure) not at the beginning of the full measure.

To avoid this possible confusion, I would strongly recommend to instead 
typeset the bar number at the first bar line of the new line.

I afraid that you may need some advanced Scheme hacking to obtain
this in LilyPond, but it's certainly doable (don't have the time to
figure out the details right now).

  /Mats


Quoting Walter Hofmeister <address@hidden>:

> Hello all,
>    I have a problem whose solution eludes me. In general, when you have a
> partial measure, the bar count does not get incremented. When you have a
> piece that contains a section that ends on a partial measure and then the
> next section begins with a pick up (partial measure as well), it is
> necessary to tell Lilypond what the measure is with:
> \set Score.currentBarNumber = #x so that the bar numbers will compute
> correctly. Where the problem comes in for me is when the partial bar that
> ends the first section appears at the beginning of the line. When this
> happens, Lilypond seems to refuse to print the bar number at the beginning
> of the line, which looks odd.
>    I have tried to compose a tweak that will fix this. Looking in the
> reference manual under BarNumber, I find the following:
> break-visibility (vector):
> #(#f #f #t)
> A vector of 3 booleans, #(end-of-line unbroken begin-of-line). #t means
> visible, #f means killed.
>
> > From this I am a little unsure of the syntax that I should use in my tweak,
> but I try:
> \override BarNumber #'break-visibility = #(#f #t #t)
>
> For which I get:
> Oboe.ly:51:56: error: GUILE signaled an error for the expression beginning
> here
>    \override Score.BarNumber #'break-visibility = #
>                                                        (#f #t #t)
> Interpreting music... [8]
> warning: type check for `break-visibility' failed; value `#<unspecified>'
> must be of type `vector'
> [16]
>
> It seems that the tweak was not constructed correctly, that the value for
> the vector was not expressed in the correct format. However for a non-scheme
> programmer, I am not sure how someone is supposed to figure out how to do
> this as the Reference manual will tell you all that you may change, but
> nowhere have I found a reference for the syntax of each data type that you
> might encounter in lilypond. For the programmers on the list this might seem
> painfully obvious, but to us non-programmers it isn't. Is it possible that I
> have encountered a bug?
>    I have included the file below and a .pdf of the result. Thanks for your
> time.
>
> Walter Hofmeister
>
>
>
> *************************Lily file starts here**************************
>
> \version "2.11.23"
> \include "english.ly"
> #(set-default-paper-size "letter")
> #(set-global-staff-size 23)
>
> \paper{
>    top-margin = 1\mm
>    after-title-space = 10\mm
>    line-width = 165\mm
>    left-margin = 20\mm
>    between-system-space = 25\mm
>    ragged-last-bottom = ##t
> }
>
> \header {
>    title = "Bourree"
>    composer = "J.S. Bach"
>
> }
>
> melody = \relative c'' {
>        \clef treble
>        \key g \major
>        \time 2/2
>        \stemNeutral
>    \repeat volta 2 {
>    \partial 8*2
>    b8( c)
> % 1
>    d4-. g-. d-. c-.
>    b4-.\breathe g'-. b,-. a-.
>    g4-- b8( a) b4-. cs
>    d8( cs d e) d( c b a)
> % 5
>    b4-.\breathe b'-. e,-. d-.
>    cs4-. e-. a-. g-.
>
>    fs8( e fs g) fs[( e d cs])
>
>    \partial 4*3
>    \set Score.currentBarNumber = #8
>    d2.
>    }
>
>    \repeat volta 2 {
>    \partial 8*2
>    \override Score.BarNumber #'break-visibility = #(f t t)
>
>    fs8( g)
>
>    \set Score.currentBarNumber = #9
>    a4-. d-. a-. g-.
> % 10
>    fs4-.\breathe d'-. fs,-. e-.
>    d4-. g-. c( b8 a)
>    b8( c b a) g4-.\breathe b,8( c)
>    d4-. g-. d-. c-.
>    b4-.\breathe g'-. b,-. a-.
> % 15
>    g4-- b8( a) b4-. cs
>    d8( cs d e) d( c b a)
>    b4-.\breathe b'-. e,-. d-.
>    c4-. e-. a-. c,-.
>    d8( cs d e) d[( c b a])
>    \partial 4*3
>    g2.
>    }
>
>
>
>    %\bar "|."
> }
>
>
>     \score {
>        \new Staff \melody
>        \layout { }
>        \midi { }
>     }