Re: Solution to have repeats with upbeat and different alternatives??

[Aaron Hill]

On 2018-05-17 10:22, address@hidden wrote:
>         I posted a piece of simplified code to illustrate. This is what
> the default does
> isnt 'it??
>
>         
> https://ln.sync.com/dl/2d42a9350/ukfaa7s8-rpenm7ne-xqxv7mpk-x99vbzbw
>
> [ . . . ]
>
>       the code below prints an extraneous bar in the second alternative 
> at
> the end.
>
> [ . . . ]
>
> ****************test.ly ***********
>
>  \version "2.18.2"
>
> music = \relative c''
> {
>     \time 3/4
>
>     \partial 4 a8 a |
>     a4 a a |
>
>     \repeat volta2
>     {
>       b4 b b | b4 b b |
>     }
>     \alternative {
>     { b4 b b | }
>     { c4 c }
>     }
>
>     \repeat volta 2
>     {
>      d8 d | d4 d d |
>     }
>     \alternative {
>     { d4 d }
>     { e4 e4 e4 }
>     }
> }
>
> \score { \music }

Using the snippet you provided and running against 2.19.81, I do not see 
the barline you are seeing.  (See attachment: upbeat-repeat.preview.png)

It would seem that the newer version handles implicit partial measures 
automatically.

One option is to use \partial explicitly, however LilyPond 2.18.2 warns 
about this practice.  2.19.81 does not:

%%%%
  \repeat volta 2 { d8 d | d4 d d | }
  \alternative {
    { \partial 2 d4 d }
    { e4 e4 e4 | }
  }
%%%%

You could also simply change time signatures secretly:

%%%%
  \repeat volta 2 { d8 d | d4 d d | }
  \alternative {
    { \omit Score.TimeSignature \time 2/4 d4 d }
    { \time 3/4 e4 e4 e4 | }
  }
  \undo \omit Score.TimeSignature
%%%%

That option seems to work in both 2.18.2 and 2.19.81 without any 
warnings.

-- Aaron Hill

upbeat-repeat.preview.png
Description: PNG image