Re: Hiding empty staves

[David Wright]

On Thu 02 Jun 2016 at 21:14:17 (-0400), Andrew Bernard wrote:
> I have a two stave piece using a PianoStaff. In some sections I need to
> hide the unused lower stave for a number of bars. Using \RemoveEmptyStaves
> or \RemoveAllmptyStaves does nothing. There are only spacer rests in the
> staff in question.
> 
> The NR in Section A.20 says these functions 'Remove staves which are
> considered to be empty according to the list of interfaces set by
> keepAliveInterfaces, including those in the first system.’ But what does it
> mean for a staff to be considered empty?

AFAICT just change PianoStaff to GrandStaff. I think I see the logic
in LP's behaviour.

Cheers,
David.