Re: \RemoveAllEmptyStaves and Dyanmics context line for piano pedals

[Andrew Bernard]

Hi Torsten,

Thanks so much for this supremely clear explanation.

It's quite subtle really, isn't it? A big help. Probably this context does not come up often for people - my piano scores flutter between, one, two, three, and four staves in a quite complex manner. Scriabin too, but he does not go down to one staff much, if at all, as I recall. So a kind of rare corner case arises in my work - but lilypond as usual triumphs!

Andrew

On 10 February 2018 at 20:57, Torsten Hämmerle <address@hidden> wrote:

The difference between \RemoveEmptyStaves and \RemoveAllEmptyStaves is that
\RemoveEmptyStaves will not remove empty staves in the first system, the
reason for it being that in orchestral scores it is common to display all
instruments involved in the first system - no matter if they play or not.

Your problem is caused by the fact that, from LilyPond's point of view,
staves containing "no music", i.e. rests or spacer rests only, are
considered as "empty". Therefore, dynamics will also vanish using
\RemoveEmtpyStaves.

The difference between PianoStaff and GrandStaff, by the way, is that
PianoStaff uses the "Keep_alive_together_engraver". This has the effect (in
orchestral scores) that both piano staves are shown as soon as one of them
contains music.