Re: Bar line check is wrong with partial note and voltas

[Knute Snortum]

Thanks David,

I'll be looking at this MWE and the other two you posted untilI I grok them.

---
Knute Snortum
(via Gmail)

On Mon, Oct 12, 2020 at 7:57 PM David Wright <lilylis@lionunicorn.co.uk> wrote:
>
> On Mon 12 Oct 2020 at 14:46:43 (-0700), Knute Snortum wrote:
> > On Mon, Oct 12, 2020 at 10:03 AM Aaron Hill <lilypond@hillvisions.com> 
> > wrote:
> > > On 2020-10-12 9:56 am, Knute Snortum wrote:
> > > >
> > > > I think I've run into a bug.  It's hard to explain so I will post the
> > > > MWE (it's as minimal as I could make it):
> > > >
> > > > %%% Start
> > > > \version "2.20.0"
> > > >
> > > > rightHand = \relative c' {
> > > >   \partial 4 c4
> > > >   c4 c c
> > > >
> > > >   \repeat volta 2 {
> > > >     c4 |
> > > >     c4 c c c |
> > > >   }
> > > >   \alternative {
> > > >     { c4 c c }
> > > >     { c4 c c c }
> > > >   }
> > > >
> > > >   c1 |
> > > > }
> > > >
> > > > \score {
> > > >   \new Staff \rightHand
> > > >   \midi {
> > > >   }
> > > > }
> > > > %%% End
> > > >
> > > > The c1 at the end of the music produces a bar line check warning.  It
> > > > only happens when creating a MIDI file. It only happens when the volta
> > > > is in the middle of the measure.  It only happens when an alternate
> > > > ending doesn't contain a full measure of notes.
> > > >
> > > > Any thoughts?  I really appreciate you guys.
> > >
> > > Don't you need to \unfoldRepeats when doing MIDI output?
> > >
> > > %%%%
> > > \score {
> > >    \new Staff \unfoldRepeats \rightHand
> > >    \midi { }
> > > }
> > > %%%%
> >
> > Thanks, Aaron Hill.  The only problem is this messes up my \barNumberChecks
> >
> > %%% Start
> > \version "2.20.0"
> >
> > rightHand = \relative c' {
> >   \partial 4 c4
> >   c4 c c
> >
> >   \repeat volta 2 {
> >     c4 |
> >     c4 c c c |
> >   }
> >   \alternative {
> >     { c4 c c }
> >     { c4 c c c }
> >   }
> >
> >   \barNumberCheck 5
> >   c1 |
> > }
> >
> > \score {
> >   \new Staff \rightHand
> > }
> >
> > \score {
> >   \new Staff \unfoldRepeats \rightHand
> >   \midi {
> >   }
> > }
> > %%% End
>
> Your \barNumberCheck, as you placed it, should be expecting 4 or 6,
> as in the attached, but not 5. A \barNumberCheck placed at the
> barline should be set to the number of the next measure, not the
> previous one.
>
> However, I agree that LP's a bit messy when you generate MIDI with
> folded repeats, which is something I regularly do in order to
> proof-read by ear. In this case, you get the barcheck shown by
> your version at the top of the quote above.
>
> My workaround is the same as previously: generate the MIDI first,
> then the score. My \barNumberChecks are naturally set to agree with
> the printed/folded bar numbers, so all the noise goes into the
> MIDI part of the console log, and the \layout part should be clean.
>
> Cheers,
> David.