Re: How to define some context statements

[Werner Arnhold]

Hi Thomas,

thank you very much, that was helpful.

Werner

Am Freitag, den 18.01.2019, 22:25 +0100 schrieb Thomas Morley:
> Am Fr., 18. Jan. 2019 um 11:01 Uhr schrieb Werner Arnhold
> <address@hidden>:
> >
> > Dear list,
> >
> > I often need to have Midi output with different volume or instruments in
> > some voices. Here an example:
> >
> > \version "2.18.2"
> >
> > global = {
> >   \key c \major
> >   \time 4/4
> > }
> >
> > soprannoten = \relative c'' {
> >   g e e2 f4 d d2
> > }
> >
> > altnoten = \relative c'' {
> >   c2 g g2 b4 f
> > }
> >
> > \score {
> >   \new ChoirStaff <<
> >     \new Staff <<
> >       \set Staff.instrumentName = #"Sopran"
> >       \new Voice = "sopran" <<
> >         \set midiInstrument = #"flute"
> >         \global
> >         \soprannoten
> >       >>
> >     >>
> >     \new Staff <<
> >       \set Staff.instrumentName = #"Alt"
> >       \new Voice = "alt" <<
> >         \set midiInstrument = #"violin"
> >         \global
> >         \altnoten
> >       >>
> >     >>
> >   >>
> >   \layout{}
> >   \midi{
> >     \tempo 4 = 80
> >       \context {
> >         \Staff
> >         \remove "Staff_performer"
> >       }
> >       \context {
> >         \Voice
> >         \consists "Staff_performer"
> >       }
> >   }
> > }
> >
> > This works fine. Now I tried to separate the "\context" parts in the
> > midi section like
> >
> > verschiedene_stimmen = {
> >   \context \Staff \remove "Staff_performer"
> >   \context \Voice \consists "Staff_performer"
> > }
> >
> > score {
> > .
> > .
> > .
> >   \midi{
> >     \verschiedene_stimmen
> >   }
> > }
> >
> > Lilypond complains about unvalid escape sequence "\Staff" at the Place
> > of the definition, unexpected "\remove" and so on. That happens even if
> > I do not call the defined macro in the midi section.
> >
> > What will be the reason and how can I make it better. I intend to
> > collect such often used constructs in a separate file.
> >
> > Thanks in advance!
> >
> > Werner
> 
> Hi Werner,
> 
> looking at your example, there is no need to move "Staff_performer" at all.
> Just set midiInstrument in Staff, You could do so with \set 
> Staff.midiInstrument
> But this is done better in \with { ... }, otherwise it may happen you
> meet issue 34 in some cases. Same for instrumentName.
> 
> Only if you have more than one Voice per Staff moving
> "Staff_performer" would make sense.
> 
> To store the settings in a callable variable you could do:
> 
> \version "2.18.2"
> 
> soprannoten = \relative c'' {
>   g e e2 f4 d d2
> }
> 
> altnoten = \relative c'' {
>   c2 g g2 b4 f
> }
> 
> verschiedene_stimmen_midi = \midi {
>   \context { \Staff \remove "Staff_performer" }
>   \context { \Voice \consists "Staff_performer" }
> }
> 
> \score {
>   \new ChoirStaff <<
>     \new Staff <<
>       \new Voice = "sopran" \with { midiInstrument = #"flute" }
>         { \voiceOne \soprannoten }
>       \new Voice = "alt" \with { midiInstrument = #"violin" }
>         { \voiceTwo \altnoten }
>     >>
>   >>
>   \layout{}
>   \midi {
>     \verschiedene_stimmen_midi
> %% needs to be called after 'verschiedene_stimmen_midi'
>     \tempo 4 = 80
>   }
> }
> 
> HTH,
>   Harm