Re: context-sensitive context creation

[Mats Bengtsson]

A low-tech solution is to let all voices start at the top
of the score and use s1*15 or \skip 1*15 constructs to skip the 
sections where the voice shouldn't be active.

  /Mats

Quoting Jordan DeLong <address@hidden>:

> Hey all; I'm trying to figure out how I can structure an input file
> that should be displayed in both a normal Staff and a TabStaff without
> writing the actual music twice.  I've found examples and stuff in the
> list archives that work fine as long as the number of voices stays
> basically constant, but for this, some parts of it should be
> polyphonic and some parts not.
>
> What I'd like to do, is declare a scheme function or something that
> allows me to make new contexts that are either Voice or TabVoice
> depending whether it can find a TabStaff context.
>
> The ly:context-find function looked potentially promising.  But I
> couldn't figure out how to use it from the documentation.  (Or for
> that matter whether it can do this.)
>
> In case the above isn't making sense, I want to do something along the
> lines of:
>
> \version "2.8.7"
> makeCorrectVoice = #(define-music-function ... something-or-another)
>
> piece = {
>  \time 4/4
>  \relative { c4 g c g }
>  % now it becomes polyphonic
>  <<
>    \makeCorrectVoice { \relative { c4 g c g } }
>    \makeCorrectVoice { \relative c' { c8 c g. g16 g4 g } }
>  >>
>  % now back to a single voice
>  \relative c { c4 c c c }
> }
>
> % put it together
> \new StaffGroup {
>  \new Staff {
>    \clef "G_8"
>    \tempo 4=500
>    \piece
>  }
>  \new TabStaff { \piece }
> }
>
> Any ideas?
>
> [ I'd appreciate being CC'd on any replies, since I am not a list
> member. ]
>
> Thanks,
> --
> Jordan DeLong
> address@hidden