Frederic,
Maybe have a look at autotranspose from OpenLilyLib:
https://github.com/openlilylib/oll-misc/tree/master/pitch. You may find it
more intuitive.
Saul
Saul
On Sat, Jan 4, 2025, 10:58 AM David Kastrup <d...@gnu.org> wrote:
> Frédéric <ufosp...@gmail.com> writes:
>
> > I have some music written for instruments in ut. So I write
> > \transposition c' in the source code.
> > When I use \transpose to adapt the music to a clarinet, \cueDuring do
> > not transpose the cue notes.
> >
> > In the example below,
> > - the violin gets the cue notes in ut which is good
> > - ClarinetI has the notes written 1 tone up so that the clarinet
> > sounds the same as the singer but the cue notes are still written in
> > ut when it should be 1 tone up
> > - ClarinetII has everything written for clarinet (1 tone up) but that
> > required to writte \transposition bf in the music in ut (before
> > applying \transpose) which looks strange to me.
> >
> > So I have the impression that there is a bug, i.e. that \transposition
> > should be changed when \transpose is applied.
> >
> > Thanks,
> >
> > F
> >
> > \version "2.25.20"
> >
> > \language "english"
> >
> > Singer = \relative {
> > \transposition c'
> > c' d e f g a b c
> > }
> >
> > \addQuote "Singer" \Singer
> >
> > Violin = \relative {
> > \transposition c'
> > c'' d e f \cueDuring "Singer" #DOWN { g a b c }
> > }
> >
> > ClarinetI = \transpose c d \Violin
> >
> > ClarinetII = \transpose c d \relative {
> > \transposition bf
> > c'' d e f \cueDuring "Singer" #DOWN { g a b c }
> > }
> >
> > \score {
> > \new Score <<
> > \new Staff \with { instrumentName = "Singer" } << \Singer >>
> > \new Staff \with { instrumentName = "Violin" } << \Violin >>
> > \new Staff \with { instrumentName = "ClarinetI" } << \ClarinetI >>
> > \new Staff \with { instrumentName = "ClarinetII" } << \ClarinetII >>
> > >>
> > }
>
> I think you are mistaken. The purpose of \transposition is to change
> the relation between written and sounding notes; the purpose of
> \transpose is to change the written notes. Those purposes are
> orthogonal.
>
> When you are writing notes to be used by instruments in different
> transposition, it is a bad idea to put a \transposition in the notes.
> That pins down the relation between written and sounding notes, and you
> don't want that.
>
> You can create MIDI to hear what LilyPond's idea of sounding notes is:
> the cue notes are engraved by looking at both the transposition of the
> current staff as well as that of the quoted staff. For this to work
> sensibly, the \transposition has to appear in the staff of the
> instrument actually playing at a different concert pitch, not anywhere
> else.
>
> --
> David Kastrup
>
>
