Re: [Lilypond-auto] Issue 2835 in lilypond: set Instrument Change information once per Staff, not once per Voice

[lilypond]

Comment #6 on issue 2835 by address@hidden: set Instrument Change information  
once per Staff, not once per Voice
https://code.google.com/p/lilypond/issues/detail?id=2835

Well, it's conceivable to have both a cue as well as a full voice (like  
when the full voice just repeats itself and is not useful for cueing a  
waiting full voice).

In that case, any instrument name switches might need to follow the general  
voice direction.  Or something.

With regard to just using music variables: one thing is a name-space  
problem: \kaspar is more likely to indicate the content rather than the  
switcheroo.  \setKaspar or even \set-kaspar would help with that.

All in all I agree that it's not clear that this feature is really overly  
helpful.  The one thing it provides is an implied \context \Staff { ... }  
and converting all overrides to overrides at staff level.

But basically one can achieve that even with music these days by filtering  
it through
(context-spec-music (make-apply-context
   (lambda (c) (ly:context-mod-apply! c #{ \with { #music } #}))) 'Staff)
which would then reroute all overrides to Staff level.  So if such a  
rerouting
is desired, providing a command that does it is comparatively simple.

Obviously _somebody_ is using that feature and I seem to remember that  
somewhere is a notice that it had been sponsored.

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