Re: Locally disable hiding of empty staves?

[Alexander Kobel]

Kieren MacMillan wrote:
> Hi Alexander,
> 
>> does anybody know whether/how it's possible to locally
>> prevent staves from hiding troughout a part of the piece?
> 
> See Neil's solution to the same question, which I posed almost exactly a
> year ago:
>     http://lists.gnu.org/archive/html/lilypond-user/2007-08/msg00366.html

While this works perfectly, I still have one question left:
Is it possible to "group" staves for this functionality; i. e., I want
the choir staves to vanish if /all/ voices have rests, but if there's at
least one voice singing, the complete choir staves should be there?


Cheers,
Alexander