Re: percent repeat does not work with multiple (drum)voices

[James Bailey]

On 31.12.2009, at 15:18, Corien Prins wrote:

> > I'm not top posting.
>
> % When percent repeat is used in drummode, all output in the
> % same score after the repeat is messed up: the different voices
> % creat their own staff with a different clef.
> % When 'percent' is replaced by 'unfold' or 'volta' it works fine.
>
>
> \paper{ ragged-right=##t }
> \version "2.12.1"
>
> \score {
>    \new DrumStaff <<
>       \new DrumVoice = "1" { s1 *2 }
>       \new DrumVoice = "2" { s1 *2 }
>       \drummode {
>          \repeat percent 2 {
>             << {hh8 hh hh hh hh hh hh hh|} \\ {bd4 sn bd sn|} >>
>             << {hh8 hh hh hh hh hh hh hh|} \\ {bd4 sn bd sn8 bd8|} >>
>          }
>          << {hh8 hh hh hh hh hh hh hh|} \\ {bd4 sn bd sn|} >>
>          << {hh8 hh hh hh s2|} \\ {bd4 sn sn16 sn sn sn sn16 sn sn  
> sn |} >>
>       }
> > >
> }

I think what you want is this:
\version "2.12.1"

\new DrumStaff <<
   \new DrumVoice \drummode {
      \voiceOne
      \repeat percent 2 { \repeat unfold 2 { hh8 hh hh hh hh hh hh  
hh } }  |
      hh8 hh hh hh hh hh hh hh   |
      hh8 hh hh hh s2   |
   }
   \new DrumVoice \drummode {
      \voiceTwo
      \repeat percent 2 { bd4 sn bd sn | bd4 sn bd sn8 bd } |
      bd4 sn bd sn   |
      bd4 sn sn16 sn sn sn sn16 sn sn sn  |
   }
>>

If so, then organizing your voices differently might help. Basically,  
the problem is that the {s1*2} in your original only keep the  
DrumVoices alive for two measures, but your music is longer than two  
measures. The <<{}\\{}>> construct is equivalent to <<\new Voice =  
"1" {\voiceOne} \new Voice = "2" {\voiceTwo}>>. You'll note that the  
\new DrumVoice and \drummode commands are missing from this  
construct. I would advise against using them. Also, so you know,  
before posting something to the bug list, it's better to post it to  
the lilypond-user list, most problems (like this) stem more from a  
misunderstanding of how the program works, rather than an actual  
problem in the program.

James