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Re: smart transpose

From: Olivier Guéry
Subject: Re: smart transpose
Date: Tue, 24 Apr 2001 13:06:09 +0200

Le Mardi 24 Avril 2001 09:18, vous avez écrit :
> >             Hello,
> >     I use lily a lot for transposing my score.
> >     Transposing is one of the borest tging in music (and I play a Bb instrum
> > ent,
> > so I know the problem).
> >     With lily the \transpose commande work fine but I often have B#, E#, and
> >
> > other boring note.
> >     I tied to use smart-transpose has describe in the
> > file but the result is not what I whant.
> >     Is it possible (before 1.4, it would be great, but I understand that we
> > must
> > decided to stop at one moment :o) to have a command \smart-transpose,
> > working like \transpose (and maybe \smart-transpose instead of
> > \transpose, who like B# ? or Cx ?)
> >     If it's not possible to include this feature yet, I send one of my .ly
> > file I'd like to transpose, if anyone can explain me how it work... I
> > understand that I would normaly give me a .dvi with the same musique one
> > transpose and the other not, but it's not what append... In fact, of
> > course, I only want the transpose one :o)
> >     Thank's,
> >             nemo.
> I'm not exactly sure how you want to transpose your example.
> Both copies of your music is tranposed in the example,
> \transpose cs' \music raises one semitone and
> \apply #(lambda (x) (smart-transpose x (make-pitch 0 5 1)))
> raises 10 semitones (c to a sharp, and so on).
> As a first step to understand the two tranposition mechanisms,
> I'd suggest that you make the same transposition both times:
> \transpose cs' \music
> \apply #(lambda (x) (smart-transpose x (make-pitch 0 0 1)))
>        \music

        OK, I was thinking that  "make-pitch" chage something but I does not 
understood what the three numbers are about.

> Then, you will notice that the smart-transpose is not very smart,
> since it doesn't transpose the key signatures. If you set the
> key signature manually to the transposed key, I guess the result
> is more or less what you want.

It don't transpose key signature... Not very usefull, you're right.

> I think it would be better to use the builtin transpose function
> and implement a Scheme function 'simplify' that makes the desired
> enharmonic changes, something like
> \apply #simplify \transpose cs' \music
> I don't have the time right now to implement it, but some
> Scheme hacker on the list should be able to do it.
> This function might be useful also in other situations where you
> don't want to transpose but the composer wrote something unreadable.

        That's sure for exemple in jazz, we need to have diffrent part in C, Bb 
(clarinet, trompet, tenor/soprano sax), Eb (alto/barytone sax). One a 
"simple" score, just like in a real book.

> On the other hand, I find it confusing to see an 'f' instead of
> an e sharp if the melodic function of the note is e sharp, but
> that's individual and probably also dependent on the instrument.

        Maybe but I just need to give score to my friend in order to say "let's 

> I notice that you still use whole notes in 2/4, are you sure that
> you don't want c2 (or possibly c1*1/2) instead of c1, to get rid
> of the extra bar lines.

        I know, you allredy correct me, but I had no time to change it.

> Also, you may want to use ties for tied-over notes,
> for example df8 ~ df4 instead of df8( )df4

        Before I use the  
\translator {
       SpacingSpanner \override #'arithmetic-basicspace = #3
        lines, Rune "gave" me, I found tied over more readable.

        Thank's for all

Olivier Guéry   address@hidden

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