Re: tranpose relative to the last pitch

[Tom van der Hoeven]

David,

I hope I am not boring you!
My wife is playing in a orchestra the alt-violin part on the violin.
In order to accommodate that the sheet music has to be rewritten with 
the violin key, and pitches lower than g have to be changed.
I first bring the original with the alto key in the lilypond format 
using relative mode.
I change the key and the notes under g,  taking into account the notes 
of the first and second violin. Eventually I change some notes around.
Most of the changes are an octave, a fifth or a third.

I started with different versions in different directories.
Now I change to one version with variables, functions and tags.

-- The ultimate goal is to place {} around the pitches involved and 
place the appropriate function before it.

-- The function I described does that except that occasionally octave 
changing marks at the first pith of the argument of the function and 
after the function are needed. I can live with it, but I am striving to 
avoid that.

I hope this clarifies my last mail.
I have not yet tried your suggestion with make-relative

Thanks for your time.

Tom

David Kastrup schreef op 13-12-2013 11:57:
> Tom van der Hoeven <address@hidden> writes:
>
> > > David Kastrup schreef:
> > > > David Kastrup <address@hidden> writes:
> > > >
> > > > > Tom van der Hoeven <address@hidden> writes:
> > > > >
> > > > > > Suppose I have
> > > > > > music = \relative c'{c b a g     f e e f     g a b c}
> > > > > > my instrument is limited so it cannot play the pitch f end below
> > > > > > I have to raise  f e e f by a terts of an octave
> > > > > > Is there a function shift or can it be made such that
> > > > > >
> > > > > > music = \relative c'{c b a g     \terts{f e e f}     g a b c}
> > > > > >
> > > > > > is equivalent to
> > > > > >
> > > > > > \relative c'{c b a g     a g g a     g a b c}
> > > > > >
> > > > > > if you use :
> > > > > > terts =  #(define-music-function (parser location ploep) (ly:music?)
> > > > > > #{ \transpose c e \relative c' $ploep #})
> > > > > >
> > > > > > the c' after \relative should actualy be the last-pitch (in the example g)
> > > > > > Help will be appreciated
> > > > > The current development version has a new definition of makerelative
> > > > > allowing for
> > > > >
> > > > > terts =  #(define-music-function (parser location ploep) (ly:music?)
> > > > >     (make-relative (ploep) ploep
> > > > >       #{ \transpose c e $ploep #}))
> > > > Actually, looking at the pitches you ask for, you'll rather need
> > > > \modalTranspose here.
> > Thank you David,
> >
> > I see you point. With \modalTranspose you can automatically change the
> > notes that are within the range of the scale.
> I don't see that we are talking about the same thing.  Your example was
> supposed to transform f to a (a major third up) but e to g (a minor
> third up).  It seems like you want to stay in your mode.  \transpose
> does not do that.
>
> > But I change the notes based on visual inspection. In fact I colour
> > all notes f and lower in red, so that it catch the eye immediately.
> I have no idea how that is supposed to be related to your original
> request.
>
> > If I change a few successive notes I rather place no extra octave
> > changing marks on the first pitch. ( the first f after \terts{ )
> > It is clear that the pitches after \terts{..} might need extra octave
> > changing marks because they relate to the pith just before \terts{..}
> Have you tried the code I proposed?  Inserting \terts { and then some }
> afterwards will then not change the octave relations at all.
>
> > So within \terts I want to know the absolute value of the g before
> > \terts{...}
> Again, I have no idea what you want to say here.