Re: Strange polyphonic behavior

[Eluze]

Helge Kruse-5 wrote
> I have found a strange behavior with incomplete staves. This is not really
> important for a complete score, since you usually want to have all staves
> to have the same number of measures. But while entering the notes I've
> been
> surprised that empty staves will be drawn to the end of the piece when a
> specific pattern is in the music. Here's an example:
> 
> 
> Both measures use polyphonic notes as shown at "Double backslash
> construct"
> in NR 1.5.2 . In the second measure the second expression is "incomplete".
> When you comment out the second measure only the lower stave is drawn to
> the end. The same appears when you add "s s s" after the e8 to fill the
> second expression of the measure.
> 
> So one could guess that the second expression must have the same length as
> the first in polyphonic. But when you shorten the c2 in the first measure
> to c4 nothing similar appears. This is quite strange. Are are any
> dangerous
> thing to expect when the first and the second expression of a polyphonic
> are not at equal length?

that's because you use a PianoStaff and the /Keep_alive_together_engraver/
is integrated with this - so when one staff has nothing but the other has,
both staves keep alive. if both staves have no notes, the whole pianostaff
would be removed.

to change this behavior add /\remove Keep_alive_together_engraver/ in the
\layout or \with block

Eluze



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