Consider this example.
```
{
c'1 |
\repeat volta 2 {
c'1 \clef bass |
\alternative {
\volta 1 {
c1 \clef treble |
}
\volta 2 {
\clef bass c |
}
}
}
}
```
There should be a change treble clef right before the repeat barline,
and there should also be a reminder bass clef right after the repeat
barline. How can I achieve this?
Ideally, the volta engraver should be able to manage this
automatically (i.e., it should do what's written in the LilyPond
example code above), but I guess that this is a hard problem because
there are two clef change events at the same musical moment...
Such situations do actually happen in piano music.
Werner
