Re: score transposition problem

[Marc Hohl]

Am 13.04.2011 09:56, schrieb Janek Warchoł:
> Hi,
>
> 2011/4/13 Marc Hohl<address@hidden>:
> > Am 13.04.2011 06:15, schrieb Tom Cloyd:
> > > I have a simple problem which I've never before faced, and I'm hoping
> > > there exists a simple solution about which someone can tell me.
> > >
> > > I play and write music for classic guitar, so I use "\clef "treble_8"" in
> > > my scores (classic guitar sounds an octave lower than the music notation).
> > >
> > > I want to arrange a Bach chorale for guitar. My score for the chorale is a
> > > nightmare. I can barely read bass clef, and can do that in my mind, but the
> > > scores for soprano, alto, and tenor all use C-clefs, and in a way that each
> > > score must be read in a unique way. I've never before seen a score like
> > > this. The notes fit nicely on the staff, but I cannot read them without a
> > > lot of mental gymnastics.
> > >
> > > Is there a way simply to input the notes to a lilypond file as if they
> > > were in my normal G-clef, such that, for example, the F-clef for the bass
> > > part, where the note is placed on the top line of the staff (an A), I would
> > > record it as an F, then magically move the notes up or down enough
> > > semi-tones to get to a correct placement on the treble_8 clef, at which
> > > point I add key signature to my *.ly file and I'm ready to begin my
> > > transposition, using the PDF output to play from...?
> > Well, you describe how to proceed: just input the notes as if they were
> > written on G clef.
> >
> > Your "f" is actually written f'' and should sound like an "a", so just add
> >
> > \transpose f'' a { \myMusic }
> >
> > and it should work out of the box. The same holds for the C clefs, of
> > course.
> Actually, it doesn't. It's because \transpose is chromatic, and the
> staff itself isn't. Compile the following:
Ah, I see :-(
Well, it looked so simple ...
> realMusic = { a b c' d' e' f' g' a' }
> \staff { \clef "bass" \realMusic }
> writtenDownAsIfItWasInTrebleClef = { f'' g'' a'' b'' c''' d''' e''' f''' }
> \staff { \clef "G" s1*0^"this should print a minor scale, but it
> doesn't" \transpose f'' a \writtenDownAsIfItWasInTrebleClef }
>
> Interestingly,
> \staff { \clef "G^13"\writtenDownAsIfItWasInTrebleClef }
> outputs something like you want. However, even if one would hide the
> "13" above clef, it is structurally wrong (it only displays notes
> correctly, their internal pitches are f'' g'' a'' b'' c''' d''' e'''
> f''') and will produce wrong midi and cues.
> Nevertheless, it must be possible to modify the function which handles
> this special clef to convert notes properly.
> Perhaps diatonic transposition would do - there was some discussion
> about it and if i remember correctly a working prototype exists.
> Search mailing archives.

Here are some starting points:

http://lists.gnu.org/archive/html/lilypond-user/2008-12/msg00805.html


http://lists.gnu.org/archive/html/lilypond-user/2008-12/msg00815.html

Marc


> Hope this helps,
> Janek